Good morning (or is it afternoon where you're at?)and welcome to the forums, Harrowell7. Almost every country has released stamps with birds of prey as the subject. I would suggest checking the "Topical Stamps" heading at
ebay or whichever stamp sales website you visit. I have stamps in my collection from Austria, China, GB, Ireland, Iceland, Poland and Russia picturing raptors. Back in 2012 the US issued a set of 5 85¢ (3 ounce rate at the time) stamps picturing the heads of the Goshawk, Peregrine Falcon, Golden Eagle, Osprey and Harrier.