What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?


PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

On May 15, 11:06*am, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

It happens here in NJ too. I would say this year it's been
happening above average. Maybe one a day. I have a
contemporary house with large windows in the front, live
in a wooded area, so it does happen. I'd say about 80%
of the time they survive.

A few years ago, in the middle of winter, I had a flock
of robbins that kept repeatedly slamming into the windows.
It went on for a couple of hours.
Twenty years ago, you never saw robbins here in winter.
I felt bad for them, but what can you do.....

One year I had a robbin hell bent on getting into one of
the basement windows. Only happened that once, but
that bird just kept trying and trying for a couple hours.

Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?


Likely, the birds see their own reflections, and are trying to chase away the
intruded. I've heard of placing pictures, for instance - of owls, on the windows
to let them know there is something in the way.

On Wed, 15 May 2013 08:06:33 -0700 (PDT), Robert Macy
wrote:

What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?

Not this year, but about 10 years ago, I had this. For 2 or 3 summers
in a row. I think it was the same bird. He would hit the rear
sliding glass door about 10 times, t hen fly around to the front and
hit the front sliding glass door about 10 times. Maybe 20 times.
Every day.

I don't think he ever hurt himself. I always thought he got tired.
The lights are usually off here during the day, and I wouldn't think
he could see inside very well. There also doesn't seem like anything
in here would interest him. Well, there was a big spilled bag of
bird seed under the piano, but at the time I didn't think he could see
that, what with glare on the south-facing glass door. And since in
the wild, bird seed isn't in a big pile, except in feeders where I
thought they relied on smell to find it, I don't think that was the
attraction. And he'd have to remember the bird seed to fly around to
the front to try to get in there. And it was only one bird, I think.

I'll try to remember to look in and see if he could have seen it.

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

Of course you don't sound like bugs. How silly is that. But when
you're quiet, you sound like seeds.

Robert,

I'm in NC and this year has been way above average for bird-window
interaction. Several collisions per day. Ocurred throughout theWinter and
into April. Seems to have stopped. They destroyed a pane in a storm door.

Dave M.

On Wed, 15 May 2013 08:06:33 -0700 (PDT), Robert Macy
wrote:

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

Do your windows have a reflective film :banghead

Are the birds migratory birds?

Did the birds find a stash of fermented seed?

On May 15, 11:06*am, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

I can't speak to the recent Hitchcock-ian behavior of the birds in
your area, but I can offer this:

Nature Centers often use a silhouette of a flying bird to prevent the
birds from flying into the windows. Just like we humans and our cars,
birds don't like to occupy the same space as another bird. They will
do their best to avoid the silhouette and thereby avoid the window.

On May 15, 11:40*am, "
wrote:
On May 15, 11:06*am, Robert Macy wrote:





What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

It happens here in NJ too. *I would say this year it's been
happening above average. *Maybe one a day. *I have a
contemporary house with large windows in the front, live
in a wooded area, so it does happen. *I'd say about 80%
of the time they survive.

A few years ago, in the middle of winter, I had a flock
of robbins that kept repeatedly slamming into the windows.
It went on for a couple of hours.

....

Twenty years ago, you never saw robbins here in winter.
I felt bad for them, but what can you do.....

You can open the window.


One year I had a robbin hell bent on getting into one of
the basement windows. * Only happened that once, but
that bird just kept trying and trying for a couple hours.- Hide quoted text -

- Show quoted text -

On Wed, 15 May 2013 11:04:31 -0700 (PDT), DerbyDad03
wrote:

Nature Centers often use a silhouette of a flying bird to prevent the
birds from flying into the windows. Just like we humans and our cars,
birds don't like to occupy the same space as another bird. They will
do their best to avoid the silhouette and thereby avoid the window.

....until it is baby making time

On May 15, 2:20*pm, Oren wrote:
On Wed, 15 May 2013 11:04:31 -0700 (PDT), DerbyDad03

wrote:
Nature Centers often use a silhouette of a flying bird to prevent the
birds from flying into the windows. Just like we humans and our cars,
birds don't like to occupy the same space as another bird. They will
do their best to avoid the silhouette and thereby avoid the window.

...until it is baby making time

I could be wrong, but I don't think that birds simply mate with
whatever bird they happen to fly by. I think there's a little more to
it than that..like maybe some type of agreement between the two
parties.

On Wed, 15 May 2013 11:44:57 -0700 (PDT), DerbyDad03
wrote:

On May 15, 2:20*pm, Oren wrote:
On Wed, 15 May 2013 11:04:31 -0700 (PDT), DerbyDad03

wrote:
Nature Centers often use a silhouette of a flying bird to prevent the
birds from flying into the windows. Just like we humans and our cars,
birds don't like to occupy the same space as another bird. They will
do their best to avoid the silhouette and thereby avoid the window.

...until it is baby making time

I could be wrong, but I don't think that birds simply mate with
whatever bird they happen to fly by. I think there's a little more to
it than that..like maybe some type of agreement between the two
parties.

Sure. One party sees himself and goes after the one in the reflection.

That would be if the colors and size match up :-\

On 5/15/2013 11:06 AM, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?


PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.


Thinking of bird kills by windmills, I googled this up from the
Washington Post in response to them killing 500,000 per year:

The American Wind Energy Association, which represents the industry,
disputes the conservancy’s projection, and also the current Fish and
Wildlife count, saying the current bird kill is about 150,000 annually.

Over nearly 30 years, none of the nation’s 500 wind farms, where 35,000
wind turbines operate mostly on private land, have been prosecuted for
killing birds, although long-standing laws protect eagles and a host of
migrating birds.

If the ongoing investigation by the Fish and Wildlife Service’s law
enforcement division results in a prosecution at Pine Tree, it will be a
first. The conservancy wants stronger regulations and penalties for the
wind industry, but the government has so far responded only with
voluntary guidelines.

“It’s ridiculous. It’s voluntary,” said Robert Johns, a spokesman for
the conservancy. “If you had voluntary guidelines for taxes, would you
pay them?”

The government should provide more oversight and force operators of wind
turbines to select sites where birds don’t often fly or hunt, the
conservancy says. It also wants the wind industry to upgrade to
energy-efficient turbines with blades that spin slower.

The lack of hard rules has caused some at the conservancy to speculate
that federal authorities have decided that the killing of birds —
including bald and golden eagles — is a price they are willing to pay to
lower the nation’s carbon footprint with cleaner wind energy.

But federal officials, other wildlife groups and a wind-farm industry
representative said the conservancy’s views are extreme. Wind farms
currently kill far fewer birds than the estimated 100 million that fly
into glass buildings, or up to 500 million killed yearly by cats. Power
lines kill an estimated 10 million, and nearly 11 million are hit by
automobiles, according to studies.

“The reality is that everything we do as human beings has an impact on
the natural

On Wed, 15 May 2013 11:05:40 -0700 (PDT), DerbyDad03
wrote:
...

Twenty years ago, you never saw robbins here in winter.

Where is here?

I felt bad for them, but what can you do.....

You can open the window.

Good idea.

I don't know about robins, but if you open the window where a NY
pigeon likes to sit on the sill outside, none of the pigeons will come
sit there until you close the window. They won't come in the
apartment either.


One year I had a robbin hell bent on getting into one of
the basement windows. * Only happened that once, but
that bird just kept trying and trying for a couple hours.- Hide quoted text -

- Show quoted text -

On Wed, 15 May 2013 10:58:28 -0700, Oren wrote:

On Wed, 15 May 2013 08:06:33 -0700 (PDT), Robert Macy
wrote:

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

Do your windows have a reflective film :banghead

Are the birds migratory birds?

Did the birds find a stash of fermented seed?

I saw a bunch of drunken honeybees once. Maybe it was birds but I
think honeybees. They were eating fruit that had been lying on the
ground for days. And they wobbled when they walked.

Near Richmond Va., fwiw.

On Wed, 15 May 2013 11:44:57 -0700 (PDT), DerbyDad03
wrote:

On May 15, 2:20*pm, Oren wrote:
On Wed, 15 May 2013 11:04:31 -0700 (PDT), DerbyDad03

wrote:
Nature Centers often use a silhouette of a flying bird to prevent the
birds from flying into the windows. Just like we humans and our cars,
birds don't like to occupy the same space as another bird. They will
do their best to avoid the silhouette and thereby avoid the window.

...until it is baby making time

I could be wrong, but I don't think that birds simply mate with
whatever bird they happen to fly by. I think there's a little more to
it than that..like maybe some type of agreement between the two
parties.

First the female bird builds a nest, then she lays an egg. Then it's
the male's problem trying to figure out how to fertilize the egg.

On 5/15/2013 12:22 PM, David L. Martel wrote:
Robert,

I'm in NC and this year has been way above average for bird-window
interaction. Several collisions per day. Ocurred throughout theWinter and
into April. Seems to have stopped. They destroyed a pane in a storm door.

Dave M.



This is getting creepy....first the bees, now the birds?

I've had four or five window crashers, all hummers but for a sparrow.
All died, but for the sparrow who was knocked cold for a minute or so.
Anything new in the neighborhood that might change migrations? There
was a study in Florida a few years back that found that thousands of
migratory birds (35K? each) were killed by running into transmission
towers. Perhaps keeping curtains closed would tell them it isn't a
thru-way?

On 2013-05-15, micky wrote:

ground for days. And they wobbled when they walked.

That's the bee dance, you dolt.

On May 15, 10:06*am, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.


I installed window screens. They still hit that occasionally but they
never suffer an injury from it.

On Wed, 15 May 2013 17:26:02 -0400, Norminn
wrote:

This is getting creepy....first the bees, now the birds?

At least now you know about the birds and the bees

Like someone else said, cut out an outline of a bird from construction
paper and tape it on the windows. The humane society suggests this. I
believe it should be the shape of a hawk. Go to any humane society site
and you might find a picture to use for cutting them out. OR, just
close the drapes so they see something other than glass.

On May 15, 11:06*am, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

Some birds hit so hard they mortally wound themselves. Most usually
are stunned and just make a horrible flutter/thump sound that can be
heard throughout the whole house, a bit jarring. But, like I said once
a month, or every two months is one thing. But this is getting
unnerving, even in the time I took to type this in there were two
'hits'

Anybody have any similar experiences this year, or ideas as to why the
increase?

Same experience here in middle GA... in particular a pair of
bluebirds. I don't want to take preventative measures because pair
of Phoebes
has nest within a few feet of most attacked window.

I've heard of the bird silhouette, no idea if it works. Closing the
drapes does not, the attacking bird can still see the reflection that it is
attacking.

Dave M.

Shoot the bird. Too dumb to be living.
..
Christopher A. Young
Learn more about Jesus
www.lds.org
..
..
"David L. Martel" wrote in message ...
I've heard of the bird silhouette, no idea if it works. Closing the
drapes does not, the attacking bird can still see the reflection that it is
attacking.

Dave M.

Per Bob F:
Likely, the birds see their own reflections, and are trying to chase away the
intruded. I've heard of placing pictures, for instance - of owls, on the windows
to let them know there is something in the way.

One day I came out to get in my car and there was a robin perched on the
front door chrome trim so it could see the side-view mirror.

It would peck at it's reflection in the mirror, poop, then peck
again.... there was this huge steam of bird poop on the side of the
vehicle under where it was perched. Dunno how long it had been at it,
but it must've been awhile.
--
Pete Cresswell

On Wednesday, May 15, 2013 11:06:33 AM UTC-4, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a

month, or every two months. This year it's been more like 6-8 a day!!

And even the cautious ones hang on the junction ledge and press their

heads against the glass, or tentatively flutter around over the

surface of the glass, as if they could find some opening to get

through. Some of these birds are so aggressive they go to several

windows and sliding doors.



Some birds hit so hard they mortally wound themselves. Most usually

are stunned and just make a horrible flutter/thump sound that can be

heard throughout the whole house, a bit jarring. But, like I said once

a month, or every two months is one thing. But this is getting

unnerving, even in the time I took to type this in there were two

'hits'



Anybody have any similar experiences this year, or ideas as to why the

increase?





PS: many of these birds are 'seed' eaters, so don't tell me we sound

like bugs in here! ok, a giant nut, i walked into that one.

We used to have that problem until my wife got some spider web decals to stick on the windows. There are all sorts of bird-deflector decals on the Internet; just google "spider web decal birds" or something similar and you'll get lots of hits.

We used to have that problem until my wife got some spider web decals to stick on the windows. There are all sorts of bird-deflector decals on the Internet; just google "spider web decal birds" or something similar and you'll get lots of hits.

but the idea is to get LESS hits... :-)
Mark

"Robert Macy" wrote in message
...
What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!

stuff snipped

You may be on a migratory path that varies slightly from year to year. If
that's true, then the hits should be primarily on the south side of the
house as birds fly north for the summer. You can try "bird tape" or let
your windows get dirty. Birds fly into them because they see the reflection
of trees and sky in them and think they can fly into the reflected image.

The bird tape looks just about as bad as letting the windows get dusty
enough to make the reflection not quite as vivid. I know people who've
tried hawk silhouettes and all sorts of other tricks, but if you're on a
migratory path, not much will help until they've all passed by.

Crashes usually slow down quite a bit after nesting/migration season ends.

There's another possibility. Depending on the type of bird it could simply
be a territorial thing, especially with cardinals and robins. They perceive
their reflection as a hostile intruder and fly directly at it in an aerial
game of chicken, veering off at the last moment and crashing into the glass.
From what you've described about them flying around to different windows,
this seems more likely to be what's happening to you. It used to be a
problem here until I had Andersen windows installed because they have a
one-piece screen on the *outside* of the window that dulls the reflectivity
of the window.

Still, I hear a "thwack" every now and then, but they usually recover from a
smash into the softer screen. They're not very smart little creatures,
hence the phrase "bird brain."

When the idiot neighbor kids were playing softball with a golf ball, it
dimpled the screen but didn't crack *my* window although they did shatter my
neighbor's big bay window. Replacing a pop-in screen is sure a lot easier
than replacing a shattered double-hung window. I made the kid's dad pay for
the repair because my CCTV cameras captured it all to disk. (-:

Good luck.

--
Bobby G.

On Thu, 16 May 2013 09:07:39 -0400, "(PeteCresswell)"
wrote:

Per Bob F:
Likely, the birds see their own reflections, and are trying to chase away the
intruded. I've heard of placing pictures, for instance - of owls, on the windows
to let them know there is something in the way.

One day I came out to get in my car and there was a robin perched on the
front door chrome trim so it could see the side-view mirror.

It would peck at it's reflection in the mirror, poop, then peck
again.... there was this huge steam of bird poop on the side of the
vehicle under where it was perched. Dunno how long it had been at it,
but it must've been awhile.

OT, but what the heck. . They said most dogs had a hard time watching
tv but the recent LED (or LCD or something) TVs are easier for them to
see.

On Wed, 15 May 2013 08:06:33 -0700 (PDT), Robert Macy
wrote:

What's going on? Last year we had a bird hit the windows, maybe once a
month, or every two months. This year it's been more like 6-8 a day!!
And even the cautious ones hang on the junction ledge and press their
heads against the glass, or tentatively flutter around over the
surface of the glass, as if they could find some opening to get
through. Some of these birds are so aggressive they go to several
windows and sliding doors.

I had this issue with humming birds, decades ago, but only in
one room in the house. There were two large windows, facing each
other, at opposite sides of the room, so I suppose the glass was
invisible to them and they were trying tunnel through the room.
Opening the windows was not an option, as we rely on air-conditioning
for most of the year. Our cats would sit outside and grab the stunned
birds.
In your case, it looks like the birds are guarding their
territory by fighting their reflections in the glass. I've seen this
with a Great Kiskadee on my car window. The bird would spend hours
trying to kill its "rival", and eventually became weak with the
battle, it preferred fight over feed.
http://en.wikipedia.org/wiki/Great_Kiskadee
I suggest using some anti-reflexive compound on the window.
Maybe even soap would work. Or a one way-film so it appears opaque
from the outside.
I solved my problem parking my car someplace else.
[]'s
--
Don't be evil - Google 2004
We have a new policy - Google 2012

On Fri, 17 May 2013 11:57:10 -0300, Shadow wrote:

I had this issue with humming birds, decades ago, but only in
one room in the house. There were two large windows, facing each
other, at opposite sides of the room, so I suppose the glass was
invisible to them and they were trying tunnel through the room.

Humming birds are attracted to color. Perhaps they saw something
through the glass.

When my garage door is open I sometimes have one come inside; hovering
around the red emergency pull cord that hangs down.

Cool stuff

On Wednesday, May 15, 2013 11:06:33 AM UTC-4, Robert Macy wrote:
What's going on? Last year we had a bird hit the windows, maybe once a

month, or every two months. This year it's been more like 6-8 a day!!

And even the cautious ones hang on the junction ledge and press their

heads against the glass, or tentatively flutter around over the

surface of the glass, as if they could find some opening to get

through. Some of these birds are so aggressive they go to several

windows and sliding doors.



Some birds hit so hard they mortally wound themselves. Most usually

are stunned and just make a horrible flutter/thump sound that can be

heard throughout the whole house, a bit jarring. But, like I said once

a month, or every two months is one thing. But this is getting

unnerving, even in the time I took to type this in there were two

'hits'



Anybody have any similar experiences this year, or ideas as to why the

increase?





PS: many of these birds are 'seed' eaters, so don't tell me we sound

like bugs in here! ok, a giant nut, i walked into that one.

Hang a capitalist scum bucket contractor from a tree. That will scare em away.

On Thu, 16 May 2013 08:40:12 -0400, "David L. Martel"
wrote:

I've heard of the bird silhouette, no idea if it works. Closing the
drapes does not, the attacking bird can still see the reflection that it is
attacking.

Dave M.


I went to a Humane Society "open house" with some kids, and they
actually were selling those bird silhouettes, and they were shaped like
a hawk. They claimed they work. They were cheap, so it was no big
money maker, thus I tend to think they do work.

I've never had this problem, so I could not try them.

Yet, the first website below says they dont work????

All you can do is experiment. Check out these sites.

Look he
http://birding.about.com/od/birdcons...collisions.htm
http://www.windowalert.com/

There are more sites, lots of them....
Search Google
enter: "bird silhouette"
AND/OR
"stop birds from hitting windows"

Personal note:
I had a problem with woodpeckers making holes in my wooden horse shelter
walls. I tied a bunch of aluminum soda or beer cans to plastic baling
twine, put some nails along the edge of the roof, and tied the cans to
the nails. Have not had any woodpeckers since.

(Poke hole in side of can near the pop top, run twine thru the pop top
and that hole to tie it to can, after doing several of them and having
trouble getting twine thru the holes, I made loops on the can with
baling wire, twisted it, then tied the twine to those loops).

The cans are a bit noisy, but you get used to it!