Nature Note:
A hummingbirds trick to beat the heat
The dog days of summer… We may cope with the heat by seeking shade, water, or shelter. What do the tiniest of our feathered friends do in the heat of summer? Hummingbirds, bats, ground squirrels, and a number of other creatures can enter a daily state of torpor or dormancy called estivation during the heat of the day. This deep resting state is similar to hibernation, but can be triggered by very hot as well as very cold conditions. When in a daily torpor, animals lower their metabolic rate to a tiny fraction of its active state, significantly conserving water and food resources.
The Anna’s hummingbird, pictured here, was captured in photos on its nest by photographer and SOLC volunteer Frank Lospalluto. Tiny hummingbird nests are often camouflaged with bits of lichen and located in brushy tangles, riparian areas, and on dead branches. What may look like a fire hazard to us looks like a perfect nesting spot for a hummingbird, reminding us of the importance of protecting wildlife habitat, even as we seek to improve the fire safety of our homes and communities.
In addition to sipping nectar, hummingbirds can consume two to three times their body weight daily in small insects and spiders! Backyard nectar feeders may supplement their diet and provide good entertainment, though feeders require more maintenance in summer, when heat quickly converts the sugar water into toxic alcohol. Other hummingbirds in our region include Rufous, Allen's and Calliope. Read more about hummingbirds at All ABout Birds.
Banner photo: Anna’s Hummingbird by Frank Lospalluto
