Many backyard guests—such as monarchs and orioles-make for warmer climates as temperatures drop. The rest hunker down. How they prepare and where they lay their heads sometimes differ even within the same species. But no matter how they overwinter, they do it for the same reason: to conserve energy.
As days shorten, animals take the cue from Mother Nature and add layers of fat while food is more available. These reserves essentially act as a big bank of energy that animals draw from while they're in the deep-sleeping state of hibernation,” says Kevin Brunke, natural history biologist with the Missouri Department of Conservation.
To make those reserves last, animals lower their metabolism and body temperature and slow their heart rate and breathing. “They burn fewer calories while they wait for more favorable foraging opportunities to become available,” Kevin says.
Deep Sleepers
Hibernation champs include groundhogs, ground squirrels, meadow jumping mice and some species of bats. These bona fide hibernators remain in a state of inactivity for several days, weeks or months and can sleep through loud noises and other commotion.
Denne historien er fra December 2021/January 2022-utgaven av Birds & Blooms.
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Denne historien er fra December 2021/January 2022-utgaven av Birds & Blooms.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
Sense or Nonsense? - Why some birds can taste and smell - but others can't
Does a porcelain berry taste like a blueberry to a gray catbird? Does a block of lard smell like frying bacon to a northern flicker? The short answer is no. While some avian species do have a well-adapted sense of taste or smell, they can't distinguish between flavors and odors the way humans can. They're not picking up every ingredient in the suet you put out, says José Ramírez-Garofalo, an ornithology researcher at Rutgers University in New Jersey and the director of Freshkills Biological Station in Staten Island, New York.
Maple Mania - Amazing facts about this fall foliage mainstay
Amazing facts about this fall foliage mainstay
Food-Focused and Fierce - Meet Canada jays and learn why they eat almost anything they can find
Even if you haven't heard of Canada jays, you've heard of their relatives. Members of the corvid family, they belong to the same group as American crows, blackbilled magpies, and jays including blue, Steller's and scrub. "Unlike many of the other jays, a Canada jay doesn't have a crest of any kind; it just has a rounded head," says Dale Gentry, director of conservation for Audubon Upper Mississippi River.In 2018, the Canada jay's name was changed from gray jay, but Dale thinks the former adjective was fitting. "Most of its body is shades of gray with some white," he says. "There are different subspecies that have different physical traits, but most of them have some lighter coloring on their foreheads, upper breasts and throats, each with a darker streak that starts at each eye and goes back."
IN GOOD COMPANY
BIRDS OF A FEATHER MAY FLOCK TOGETHER, but what about other collectives of critters-and what do you call them when they do?
YOUR OWN Perfect Prairie
Learn how to cultivate an oasis of grassland flora in your backyard
ON THE MOVE
Birds approach the challenges of migration in surprising ways. Learn about how they walk, swim or take the scenic route during their travels.
Autumn Wonders
Fall colors offer befitting backdrops for these stunning reader photos
Sparrow Look-Alikes
Distinct sounds help separate these similar species
Embracing the Darkness
From black plants to moody decor, Gothic garden elements can offer a unique outlet to express your dark side
Red-Hot Plants
Scarlet-hued berries add a pop of color to any garden
