Hummingbirds have 2,000 meals a day and hibernate every night.
Because hummingbirds have such a fast heart rate, they often eat up to 3 times their body weight daily to maintain their basic homeostasis. Hummingbirds frequently eat about every 15 minutes as they can not go over 5 hours without nourishment. At night, hummingbirds will sleep and cannot eat with such frequency. Entering torpor slows their metabolic rate by as much as 95% and decreases their breathing rate.