homeothermic

navigate by keyword : americas animal any are audible bean beating because biological bird birds constituting created family feeding flap flower frequencies have high highest homeothermic humans humming hummingbird hummingbirds known massspecific metabolic native rate smallest sound their they trochilidae vine which wings

Hummingbird Resting Atop Bean Vine Arbor Head skew Royalty Free Stock Photo

Indian house sparrow Royalty Free Stock Photo

Eurasian Coot or Fulica atra Royalty Free Stock Photo

White Rhinoceros Rhinocerotidae Royalty Free Stock Photo

Striking Hummingbird drinking from an orange Mexican Sunflower - Trochilidae Royalty Free Stock Photo

Red-legged Honeycreeper, Cyanerpes cyaneus, exotic tropic blue bird with red leg from Costa Rica. Tinny songbird in the nature hab Royalty Free Stock Photo

Baltimore Oriole, Icterus galbula, sitting on the green moss branch. Tropic bird in the nature habitat. Wildlife in Costa Rica. Or Royalty Free Stock Photo

Hummingbird Feeding From Flower of Bean Vine

Brilliant Hummingbird drinking from an orange Mexican Sunflower - Trochilidae Royalty Free Stock Photo

Very Young Ruby-throated Hummingbird Perched on Slender Tree Branch - Trochilidae Royalty Free Stock Photo

Cute birds. Beautiful tanager Blue-naped Chlorophonia, Chlorophonia cyanea, exotic tropical green songbird from Colombia. Wildlife Royalty Free Stock Photo

Blue-winged Mountain-tanager, Anisognathus somptuosus, Santa Marta, Colombia. Yellow, black and blue Mountain tanager, sitting on Royalty Free Stock Photo

Blue-gray Tanager, exotic tropic blue bird form Panama Royalty Free Stock Photo

Golden-hooded Tanager, Tangara larvata, exotic tropical blue bird with gold head from Costa Rica. Wildlife scene from nature. Royalty Free Stock Photo

Hummingbird drinking from an orange Mexican Sunflower - Trochilidae Royalty Free Stock Photo

Hummingbirds are birds native to the Americas and constituting the biological family Trochilidae. They are the smallest of bird. They are known as hummingbirds because of the humming sound created by their beating wings, which flap at high frequencies audible to humans. Hummingbirds have the highest mass-specific metabolic rate of any homeothermic animal. To conserve energy when food is scarce, and nightly when not foraging, they can go into torpor, a state similar to hibernation, slowing their metabolic rate to 1/15th of its normal rate.