I found this site for birders on the internet but they cover a much wider range including other wildlife and well done artistic effects. I recommend it to you. They regularly feature some of the finest curated images I have seen.
http://www.birdphotographers.net/forums/forumdisplay.php/29-Images-Of-The-Week
http://www.birdphotographers.net/forums/forumdisplay.php/29-Images-Of-The-Week