Photograph of a female ruby-throated hummingbird perched on the side of glass hummingbird feeder with a red base. The hummingbird is facing left in profile leaving the left side of its body visible. Female ruby-throated hummingbirds are small birds (4-5 in wingspan) that have tan-white under-tail, belly, chest, and throat feathers, green iridescent tail, back, neck, and head feathers, dark eyes with white eyeliner, a long pointed beak and longer tongue used to probe the interior of flowers, and black legs and feet.