That being said I have been around folks that hate flash, and say it hurts the birds? I have seen no evidence of it, and really do not think it affects them one way or another. Going from every shot with a flash to now picking only shots where necessary to get the shot.
Here are some shots where a flash was just a must use, to get the shot.
Click on the links in red for a Wiki link to the word.
Birding is free, and very enjoyable. I hope you enjoy it as much as I do.
I sincerely hope these blogs help folks.