Yes, I think it is an excellent way to share information on specific subjects with like minded people. I belong to Birds of Oz, a group sharing photos of Australian birds, an Australian History group, and a couple of Writers groups including the weekend Notes Writers Group on Facebook.
Gayle, Most days we have 2 magpies, 3 butcherbirds, king parrots, rosellas, lorikeets, & 4 kookaburras, on our verandah railing. Some days we also have 2 other birds, & 2 to 4 miners. (The grey ones.) We love 'our' birds.