year—especially breeding season—this can trigger territorial behavior.
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The bird may see its reflection and interpret it as an intruder.
And what does a territorial bird do when another bird enters its space?
It tries to drive it away.
That can mean pecking, fluttering, repeatedly flying toward the glass, or even attacking the reflection for long periods.
The Bird Usually Isn’t Trying to Break the Window
This is an important distinction.
A bird pecking at your window isn’t necessarily trying to get through the glass. Birds
It may genuinely believe another bird is on the other side.
That reflection can look surprisingly convincing from a bird’s perspective, especially when lighting conditions make the glass highly reflective.
So when the bird keeps coming back, it isn’t necessarily being stubborn.
It may simply be responding to what it believes is a territorial threat.
Why Mirrors Can Be Especially
