Hopefully this will help.
I have three books that I basically call my 'go to books'!
All three have bird patterns!! :)
The names of the books are "Block Magic", "Block Magic, Too" and "505 Quilt Blocks" (this last one is by Better Homes and Gardens).
Block Magic has what they call 'Country bird' 6", 8", 10" or 12"
Block Magic too has a 'Bluebird' and a 'Cardinal' same sizes as above.
505 Quilt Blocks has 'Bluebird' (different from above) 'Cardinal' (again different) 'Crow' and 'Dove'. These blocks are all 4".
Good luck! I don't know if this is allowed but I may be able to get you a copy of them if you need me to. I think that is okay as long as they are for personal use only. But instead of posting them here I could possibly snail mail them to you. Just let me know! :-)