Hummingbirds have the fastest metabolism of any animal. The tropical hummingbirds that live in the Andes Mountains in South America must expend considerable energy to … Read More “Study reveals new insights about torpor in hummingbirds” Hummingbirds have the fastest metabolism of any animal. The tropical hummingbirds that live in the Andes Mountains in South America must expend considerable energy to … Read More “Study reveals new insights about torpor in hummingbirds”