It’s getting colder outside, and the hummingbirds feel it. Like other birds, a cold hummingbird fluffs its feathers to keep warm. The fluffed feathers trap warm air from the hummingbird’s body.
OM-1MarkIIOLYMPUS M.100-400mm F5.0-6.3 lens400mmf/6.71/1000s2500 ISO-0.5 EV