How Birds Keep Warm in Winter

Have you ever wondered how birds can stay warm in the cold winter months? Common redpolls are a great example. These energetic foragers weigh less than 15 grams and can survive temperatures that plunge nearly 100 degrees below the freezing point! How do they do it? Birds of all shapes and sizes have special adaptations for living in cold climates. Here are just a few examples of tough birds and their tips for staying warm.

Shivering

Just like people, birds shiver to stay warm. Birds have much higher metabolic rates and burn more energy to stay warm than we do. Black-capped chickadees weigh less than half an ounce and can maintain a body temperature of 100 degrees Fahrenheit – even when the air is 0 degrees! They do this by having great insulation, being very active and remembering where they store their food. A steady supply of food is essential, because chickadees eat more than 35 percent of their weight every day! Compared to many other birds, chickadees have a large hippocampus – the part of the brain that’s responsible for spatial memory. In the fall, this part of their brain gets even bigger!

Fluffing feathers

Whether fat, fur or feathers, insulation matters for most cold-weather animals. All cold climate birds pack on body weight in the late summer and fall in anticipation of the long, cold winter, but feathers also play an important role. All birds stay warm by trapping pockets of air around their bodies. The secret to maintaining these layers of air lies in having clean, dry and flexible feathers. The cleaning process, generally known as preening, depends on the species of bird. While all birds produce a special oil from a gland near the base of their tails, some cold-tolerant birds use this oil to weatherproof their feathers. Other birds like egrets, herons and mourning doves grow special feathers that disintegrate into a powder that they use to waterproof their feathers. Regardless of what weatherproofing method they use, preening helps birds keep a water resistant top layer and a toasty warm inner layer.

Roosting and cuddling

Similar to people who may cuddle for warmth, small birds like tree swallows crowd together in shrubs, vines and evergreen trees to share body heat. They can also slow down their metabolic rate to conserve energy. Cavity nesters like nuthatches, titmice and downy woodpeckers use tree cavities and nest boxes to stay warm. Cavities and boxes provide protection from the weather and help birds hide from predators. Larger birds like American crows and ring-billed gulls are also known to flock together for warmth.
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Arizona: GFD Reduces Size of Glassford Hill Pronghorn Herd

Translocation to boost, add genetic diversity to southern Arizona populations

PRESCOTT VALLEY, Ariz. — The fastest land animal in North America can make it seem so effortless, reaching a top speed of 55 mph, then being able to coast at 30 mph for miles. When they get their wheels rolling, there isn’t a predator that can keep up with them, let alone catch them.

There is one thing, however, that an estimated 100 pronghorn that have roamed the Glassford Hill area near Prescott Valley cannot outrun — development.

On Jan. 24, the Arizona Game and Fish Department (AZGFD), in partnership with the Arizona Antelope Foundation (AAF) and local private landowners, reduced the size of the iconic herd by capturing 45 of the fleet-footed animals and transporting them to various release sites in southeast Arizona.
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Arizona: Thousands Tune In As Lake Pleasant Bald Eagles Welcome Egg

PHOENIX — Following a rollercoaster start, the next generation of bald eagles on Lake Pleasant could very well be on the way after a second egg was firmly laid in the nest.

The egg, which was laid around 4:30 p.m. Thursday, Jan. 24, came one day after a first egg was eaten by a pair of opportunistic ravens that swooped into the nest while the unassuming bald eagle parents were away. Each event was watched in real-time by thousands streaming video of the nest on the Arizona Game and Fish Department’s bald eagle nest camera.

“While this scenario occurs daily in nature, the department’s live-streaming camera allows us to bring this unfiltered nesting process to everyone with an internet connection,” said Jeff Meyers, AZGFD watchable wildlife program coordinator. “Viewers are repeatedly drawn into the daily drama of survival, tuning in to watch the eagles eat, fend off intruders — such as egg-eating ravens and a rival bald eagle — and finding time to take turns incubating the egg. All the while, viewers are learning about Arizona’s bald eagles and other native wildlife.”

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Michigan: Add your help to winter bird counts!

If you’ve got cabin fever, MI Birds partners across Michigan are hosting some cool community science opportunities that may help you embrace the cold:

The Great Backyard Bird Count (Feb. 15-18), coordinated by Audubon and Cornell Lab of Ornithology, invites people all over the world to record their bird observations for at least 15 minutes, in their own backyards.

  • All ages and birding skills welcome.
  • Join in any or all days.
  • Last year, over 190,000 people participated in this global bird count, and Michigan – with nearly 4,000 checklists submitted – was among the top 10 participating states.Project FeederWatch (various dates, November through April), organized by Cornell Lab of Ornithology and Bird Studies Canada, is a winterlong survey of birds that visit feeders at backyards, nature centers, community areas and other locales in North America.

    Erin Rowan, MI Birds program associate for Audubon Great Lakes and the DNR, suggests using tube, hopper or suet bird feeders, rather than putting seed directly on the ground or using platform feeders – these methods tend to attract deer and other unintended guests.

    “After Jan. 31, deer and elk feeding are not allowed in the Lower Peninsula,” Rowan said. “It’s part of an effort to prevent deer gathering around food sources, because that activity increases the potential spread of chronic wasting disease.” Rowan said, too, that people can get mess-free bird seed options (to keep the ground clean) at many stores and can surround feeders with fencing to limit deer access.

    MI Birds is a public outreach and education program created by Audubon Great Lakes and the DNR. Birders and hunters share similar conservation values, but rarely cross paths. MI Birds aims to deepen all Michiganders’ engagement in the understanding, care and stewardship of the public lands that are important for birds and local communities.

    For more on the regulations going into effect Jan. 31, contact your local DNR Customer Service Center. Questions about the bird count events? Contact Erin Rowan, 313-820-0809.

Grant Funding Benefits Elk Habitat, Research, Public Access in South Dakota

MISSOULA, Mont.—The Rocky Mountain Elk Foundation provided nearly $114,000 in grant funding to improve elk habitat and scientific research in South Dakota as well as a wide range of hunting heritage and other outdoor-related activities.

“Water is at a premium across the lower portion of South Dakota. This funding is helping to establish a wide-ranging pipeline project to improve more than 15,400 acres of habitat,” said Blake Henning, RMEF chief conservation officer. “It also goes toward a multi-year research effort monitoring cow elk survival plus it assists various other projects designed to enhance habitat for elk and other wildlife.”

The 2018 grants helped pay for 25 projects across Aurora, Beadle, Brule, Buffalo, Charles Mix, Custer, Fall River, Jerauld, Lake, Lawrence, Meade, Pennington, Sanborn, Tripp and Yankton Counties.

South Dakota is home to more than 4,200 RMEF members and 18 chapters. Read more

Keep feeders clean to reduce chance of disease in backyard birds

LITTLE ROCK – Birdwatchers may notice an increase in the amount of finches visiting their feeders this winter, and with that comes the possibility of a certain bacterial infection that can affect the birds’ eyes.

Karen Rowe, nongame migratory bird program coordinator for the Arkansas Game and Fish Commission, has noticed an increase in calls from concerned birders who have spotted house finches, purple finches and goldfinches with a crusty infection around their eyes.

“The infection is from a disease called mycoplasmal conjunctivitis, or finch conjunctivitis,” Rowe said. “It can cause the birds’ eyes to swell and have a residue that dries up into a crusty layer over the eye. It can lead to blindness, increased predation rates and eventually death.”

Although finches are the primary birds associated with this disease, it has been reported in up to 30 other wild bird species in North America. Read more

Michigan: Don’t miss out on Wildlife Weekend Feb. 1-3

Good food, roaring fires, nights under the stars, and entertaining classes about the state’s natural history – all of this and more are part of Wildlife Weekend, Feb. 1-3, in Michigan’s north woods. The DNR and the Michigan Alliance for Environmental and Outdoor Education have teamed up to create this fun learning experience at the Ralph A. MacMullan Conference Center on scenic Higgins Lake in Roscommon County.

DNR education manager Kevin Frailey is excited about this development.

“We offer many professional development opportunities at the RAM Center for educators who want to find new ways to bring the outdoors into their classrooms, but Wildlife Weekend is open to anyone 18 or older who’s simply interested in learning more about nature in a relaxing retreat setting,” Frailey said. “Many of the topics we cover are things you’ll hear or read about in the news from week to week.”

Two classes are available:

  • Mammal Mania is taught by Holt High School teacher Bill Hodges, who described the class as a “great chance to become an expert on Michigan mammals and learn their behaviors, tracks and identification.” Updates on bears, wolves, cougars and more are included.
  • Frailey will teach Michigan My Michigan. “This course covers everything from the Great Lake to forests, wildlife, conservation history and more,” he said. “If you want to be the Michigan natural history expert in the neighborhood or you’ve recently moved into the state, this course is perfect.”

Between classes, there will be plenty of time to enjoy the area’s gorgeous scenery, explore trails, borrow some snowshoes and just get back in touch with nature. Classes begin at 7 p.m. Friday and run through noon Sunday. Get more information and register online at maeoe.com.

Questions? Contact Kevin Frailey at fraileyk@michigan.gov or 517-284-6043.

Michigan Deer Hunters Need More Thinking Afield

By Glen Wunderlich

The Quality Deer Management Association (QDMA) has compiled its annual “State of the Whitetail” report based on data gathered from the whitetails’ range across North America and what follows is a snapshot of how Michigan stacks up to other states.  Keep in mind that the information cited is from hunting seasons from 2017/2018 and prior and not the most recent seasons just completed.

For the 2019 Whitetail Report, QDMA compared harvest data from the three most recent seasons available: 2015-16, 2016-17, and 2017-18.  

Beginning with disease reports, Bovine tuberculosis (bTB) is a bacterial infection of the respiratory system. Bovine TB is a chronic, progressive disease that can take years to develop. There is no vaccine. Prior to 1994, only eight wild white-tailed deer and mule deer were reported with bTB. Since then, it has been discovered in Indiana, Michigan, Minnesota, Montana and Wisconsin. With the exception of Michigan, bTB appears to be eradicated in the other states.  As of late November 2018, over 21,000 samples had been tested in Michigan with five new positive cases that year.  As you may know, the DNR had established two additional short deer seasons in Alpena County to mitigate the spread of this disease.

In October 2018 Michigan DNR discovered its first case of Chronic Wasting Disease (CWD) in the Upper Peninsula, just four miles from the border of Wisconsin. Additionally, two bucks suspected to be CWD-positive were harvested in late November in Gratiot and Eaton counties, where CWD has not previously been found.

Across the U.S. motorists killed over 1.33 million deer in 2017-18; that’s a whopping 22 percent of the deer harvest!  Michigan continued its bang-up job contributing some 87,959 whitetails to the roadside tally putting it in second place behind Pennsylvania’s staggering total of 141,777.  For another perspective, Michigan drivers killed .34 deer per road mile.  Based on these dismal figures, Michigan should consider lowering the cost of antlerless deer licenses below the current amounts – especially in CWD Management Zones – if it ever wants to get serious about minimizing vehicle/deer collisions.   And, the result of more antlerless deer being taken will have delivered the desired effect to minimize the spread of CWD.

Bowhunting opportunity and harvest has dramatically increased during the past two decades. In 2002, only 15 percent of the total deer harvest was taken with archery equipment, and that increased to 23 percent in 2017; amazingly, New Jersey archers took nearly 60 percent of its total deer harvest.

Michigan hunters took 311,000 whitetails with 5.5 hunters per square (PSM) mile behind only Pennsylvania’s total of 339,600 with its 7.6 hunters PSM.  This puts Michigan nearly three times the national average of bucks taken PSM!

Michigan’s antlered buck harvest is up 14 percent over its five-year average with a total of 226,656 bucks taken in 2017.  Compared to the previous year alone (2016), the total was over 30,000 more bucks taken.  However, when analyzing the composition of the bucks taken by age class, Michigan’s propensity to kill adolescent bucks (those 1.5 years old) at the rate of 46 percent of the total bucks killed continues.  In addition, with only 22 percent of the bucks taken having been 3.5 years old or older, Michigan has the fifth lowest number in the country.  Not surprisingly, there appears to be a correlation between these age-class totals.

The antlerless deer kill figures represent a five-percent decrease over the previous five-year average, although 2017 saw 5,000 more antlerless deer taken than the previous year.  What’s most concerning about the antlerless kill numbers is the fact that some 24 percent of these animals were fawns!   Either our hunters are hungrier than those in other states or we could certainly do a better job of identifying our intended targets.

One final statistic seems to be in order:  the number of non-resident deer hunters participating in Michigan deer hunts.  A scant two percent of our hunters were from other states putting us behind all but North Dakota’s one percent.  Compared to the leader in this category – Kansas with its 27 percent non-resident tags issued – Michigan with its sheer deer-herd numbers has not been a desirable destination for out-of-state whitetail hunters and it’s not because we don’t have deer.

So, there you have it – the good, the bad and the ugly.  Michigan can do a better job of deer management whether it’s on behalf of the DNR’s policies or that of its army of hunters.

Buck Harvest Up, Doe Harvest Down: QDMA’s 2019 Whitetail Report

ATHENS, GA – The Quality Deer Management Association (QDMA) Wednesday released its 11th annual Whitetail Report, a comprehensive update on the status of white-tailed deer including deer harvest trends through the 2017-18 season, the most recent hunting season with complete deer harvest data available from most whitetail states and Canadian provinces. Overall, the national buck harvest was on the rise while antlerless harvest fell, tipping the balance in favor of bucks for the first time in 18 years.

“The total antlered buck harvest of 2,879,000 in the United States was 2 percent more than the previous season, and 23 of 36 states increased their buck harvest,” said Kip Adams, QDMA Director of Conservation. “On the contrary, antlerless harvest was down slightly to 2,827,288. One state’s data did not arrive and was not included in this analysis, but it appears the national buck harvest exceeded the antlerless harvest in the 2017-18 season for the first time since 1998.”

Looking at the age structure of the buck harvest, yearlings (1½ years old) remained at record low harvest levels around 35 percent while harvest of 3½-year-old and older bucks remained high at 34 percent.

“It’s amazing to realize that one of every three antlered bucks shot in the U.S. is at least 3½ years old when it was one in every five only 15 years before,” said Adams.

Among other facts to be found in the new Whitetail Report: Read more

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