I've never heard of such a thing. Birds just don't crash due to piloting error, they are built to do things aeronautically, that nothing that man builds, can do.
Ever watched a bird flutter around a tree? - flitting from branch to branch? - flying into a bush, then turning upside down to investigate the underside of leaves for bugs?
It's incredible what a performance they can produce, and never fall out of a tree, or make a crash landing.
I've watched an eagle make a strike on a rabbit, only 25 metres from where I was working. My machine disturbed the rabbit, and he took off. The eagle pounced in a dive, hit the rabbit, and the rabbit was dead in an instant.
I went over to take a look, and the rabbit had a hole in its skull. What an amazing display of accuracy and power! The eagle just landed nearby and waited until I was gone to collect their prey .
The only instance I've heard of birds killing themselves, is swans landing on shiny new, silver-coloured CGI roofs of buildings in the Outback, on moonlit nights. They apparently mistake the silver roofs for stretches of water.