I do owls too....one way, and the easiest IMO is sculptural...you would be amazed at the myriad of different creatures you can make with a basic tab...that is how this owl started:
Another way I do owls...this is a little trickier...is to put it on a landscape.....you only have to worry about one side of the owl, but it is a little smaller so that is harder....I don't even want to get into the eyes on this one.....ugh!
The first owl has lots of silvered ivory, which makes great feathers...very earthy. I just looke at lots of owl pictures and then started experimenting.