Most options for photographing wildlife can be found with Mirrorless, Bridge or DSLR, and Pro DSLR. An important consideration is a sensor. To generalize, the bigger the sensor, the better the quality of the photographs. But, a newer technology small sensor may outperform an older larger sensor. For bird photography, you'll want to have a lens that is capable of at least 300mm zoom. Woodland birds can be captured quite easily with zooms from 300-500mm.