BirdingNZ.net

There have always been Wood Pigeons around the North shore where I live, and I've planted trees to attract them.

However they still seem to be the birds most prone to collision with windows, despite my best efforts in the way of stickers, tape etc.

I noticed a dramatic increase when I replaced the old wood frames with double glazing, and for a while I couldn't understand why, until one morning I glanced up and realized they were reflecting the sky from behind me.

I'd always thought that they perceived windows as being gaps in a solid that they could fly through, rather than clear blue sky, which was an illusion that the double glazing amplified.

This might be one reason that they haven't done as well in suburbia as expected.

Interesting observation - I'd also assumed they saw Windows as gaps but that makes more sense.

Cheers
Jim

These are the 2nd story windows, downstairs single glaze isn't a problem.

Viewed from level flight, or slightly below, they mirror the scenery behind you, especially in the morning.

Our house is 2 level in a small bush gully used regularly for feeding and as a flight path for pigeon - we've been there 3 years and no bird strike despite seeing birds swooping towards us only lifting to clear house and windows at what often seems like the last moment - maybe a slightly different aspect I'm not sure? Hopefully haven't spoken to soon.....

Cheers Jim