Ornithology is the branch of zoology that focuses specifically on birds (Kingdom: Animalia, Phylum: Chordata, Class: Aves). Ornithology is a fun science in that anyone can get involved. I grew up with a field guide to North American birds and a pair of binoculars sitting next to our kitchen window where we could sit and watch the various birds (and squirrels) coming to our bird feeders. You can tell that DeTomaso is a bird lover as well, as he has made a large number of very accurate and lifelike models of different birds. He's done over 20 so far, and keeps on going. He's proposed this as a series of actual LEGO sets, which you can suppor on Cuusoo.