Coyotes in the Neighborhood

coyote_final_sm
Coyote illustration by Gretchen Baker.

Friends of Ryerson Woods hosted a panel discussion on “The Hidden World of Wolves and Coyotes” in November 2012.  Afterwards, our executive director, Sophie Twichell, was invited to write an article on misconceptions about coyotes for the Lake Bluff Open Lands Association’s newsletter. We thought our readers might be interested in this information as well.  Let us know if you learned something new after reading the article. Enjoy! 

by Sophie Twichell

Do you hear coyotes howling at night? See them trotting down the sidewalk or crossing streets? Without a doubt, coyotes are active members of our North Shore communities.  But, how much do we really understand this medium-sized member of the dog family (along with wolves and foxes)?  Coyotes are often misunderstood, as well as underappreciated for the valuable role they are playing.  Learning more about these elusive creatures is the best way for us to live harmoniously with coyotes.

Coyotes, Canis latrans, are native to North America and currently occur throughout most of the continent. Their historical range prior to 1700 was restricted to the prairies and desert areas of Mexico and central North America. But over the past few centuries, coyotes have dramatically expanded their range across North America and now are found in an increasing number of cities in the United States and Canada. In addition to occurring in natural areas, coyotes are also found in a range of human-populated areas, including rural farms, suburbs and cities.

Stan Gehrt, Ph.D., Associate Professor in the School of Environment and Natural Resources at Ohio State University, has been leading a team of researchers studying urban coyotes in the Chicago metropolitan region since 2000.  Gehrt’s team has caught and marked 661 coyotes, including radio collaring 379.  He recently shared fascinating facts about coyotes with 200 curious community members at the Greenbelt Cultural Center in North Chicago at an event sponsored by Friends of Ryerson Woods and Conserve Lake County.

Stan Gehrt has been studying urban coyotes in Chicago since 2000. Photo courtesy of S. Gehrt.

Here is a sampling of what Gehrt’s team has discovered about coyotes on our region:

–          Most adults weigh between 25-35 lbs. A few big ones weigh in the 42-43 lbs. range. There are no 50 lb. coyotes.

–          They have individual personalities. Some are shy, others aggressive. Some howl often, others hardly at all.  Individual variation is tremendous.

–          Packs are made of family members and are very territorial.

–          Howling is a way to bring family members together, as well as to establish territory; it is not a sign of aggression or hunting.

–          Coyotes are monogamous for life; pairs only split upon the death of a mate.

–          The average litter size is 4-7 pups, although can range from 3-15.

–          Male coyotes help raise the young just as much as females.

–          February is the peak of mating season for coyotes; litters are born in April.

–          During mating and gestation is the only time coyotes will voluntarily use a den (a burrow in the ground or hollowed out tree); otherwise, coyotes usually sleep above ground in the open or in cover.

–          In captivity, coyotes can live 13 to 15 years, but in the wild, most die before they reach three years of age. Gehrt’s study found that coyotes generally have a 60 percent chance of surviving one year.

–          Coyotes inhabit virtually every green space of any significant size throughout the Chicago metropolitan region; if they are removed, new ones will move right in.

–          Coyotes in the Chicago metropolitan area confine most of their activity to nocturnal hours, whereas in natural areas, coyotes tend to be diurnal (active during the day) or crepuscular (active at dawn and dusk). This reduces the likelihood of interacting with humans.

–          Coyotes are incredibly adaptable. Gehrt showed video of coyotes crossing city streets and even interstates safely, apparently looking both ways before crossing the street and following green lights.

Over 200 people came out to the Greenbelt Cultural Center in November 2012 to learn more about coyotes. Photo courtesy of Conserve Lake County.
Over 200 people joined us at the Greenbelt Cultural Center in November 2012 to learn more about coyotes. Photo courtesy of Conserve Lake County.

Much controversy revolves around what coyotes eat.  Gehrt’s study has provided fascinating information, including some unexpected results.  A study of coyote scat (poop) revealed that the most common food items are small rodents (42 percent), fruit (23 percent), deer (22 percent), and rabbit (18 percent). They also will eat birds, frogs, skunks, insects and the occasional beaver or muskrat. Apparently the majority of coyotes in the region do not, in fact, rely on our pets (1%) or garbage (2%) for their diets.  (Scats often have more than one diet item; therefore, frequencies do not necessarily add up to 100 percent). As coyotes need to eat about 10% of their body weight each day, this preference for rodents can result in a diet of 3,000 rodents per year!  Further, coyotes serve as the primary predators on fawns. One surprising find was that coyotes control Canada Geese populations by eating the eggs. Geese parents can fight off raccoons but not coyotes. 97% of goose nest predation is carried out by coyotes. Geese and deer are often overabundant and difficult to manage. Thus, coyotes play a key role in naturally controlling rodent, deer and geese populations.

But, what about our pets? There are a few things to consider. It is natural canid (dog family) behavior to kill smaller canids. This is about instinct and survival. Given the opportunity, wolves will kill coyotes, coyotes will kill fox, and so on. This is less about getting a meal, but instead about eliminating competition. So, you want to keep an eye on your small dogs. Coyotes also may kill domestic cats for food or again to eliminate competition, but Gehrt’s study reveals that cats make up a very small part of their diet. Also, other predators eat cats, including Great Horned Owls. If coyotes live nearby, do not let pets run loose, especially domestic cats. When hiking in preserves, keep dogs on leashes.

Attendees enjoyed viewing the mounted coyotes, pelts and information provided by the Wildlife Discovery Center and the Lake County Forest Preserves.
Attendees enjoyed viewing the mounted coyotes, pelts and information provided by the Wildlife Discovery Center and the Lake County Forest Preserves.

In general, coyotes will avoid humans. Considering how many live around us and how few incidents we actually have with coyotes, it is clear they are staying out of our way. But, there are many ways we can minimize the possibility of conflicts with coyotes.  Most important is not to feed them. Many people unintentionally feed coyotes by leaving pet food or garbage out at night or by having large bird feeders. Coyotes are generally not interested in bird food, but bird feeders often attract rodents, especially squirrels, which then attract coyotes. Although coyotes seem to have a natural inclination to avoid human-related food, this can change when prey populations are low, or if the coyotes are young and haven’t yet learned to hunt effectively. If you encounter one or more coyotes on a trail, do not run away. It is part of canid (dog family) instinct to chase something that flees. That is how they chase down prey. Instead, you should make a lot of noise, as well as throw something at them.“Coyotes in the Chicago area are successful in spite of us, not because of us,” Gehrt contends. “They eat their own food, not ours.  They hunt as if we weren’t even here. They do their best to avoid us.”

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A close up of the Wildlife Discovery Center’s mounted coyote.

FIVE EASY STEPS TO AVOID CONFLICTS WITH COYOTES

Conflicts with coyotes can be avoided by taking simple precautions or by altering behaviors to avoid confrontation:

1. Do not feed the coyotes.

2. Do not let pets run loose.

3. Do not run from a coyote.

4. Repellents or fencing may help.

5. Report aggressive, fearless coyotes immediately.

To learn more about the Cook County Coyote Project, visit www.urbancoyoteresearch.com.

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The Hidden World of Wolves and Coyotes

Did you know that coyotes live in almost every green space of any size in the Chicago metropolitan area? Did you know that their cousins, the wolves, are also thriving across the state line in Wisconsin? Explore the hidden world of these fascinating predators and what their presence in our region means for people. Join us for an intimate look at these animals.

The Hidden Word of Wolves and Coyotes 

Thursday, November 8, 2012

7:00 to 9:00 p.m.

Greenbelt Cultural Center

Adrian Wydeven and Stan Gehrt, two of the country’s leading experts, will lead this discussion. Wydeven studies wolves for the Wisconsin Department of Natural Resources and Gehrt is the leading researcher of urban coyotes in the Chicago region. This program is presented in partnership with Conserve Lake County, Lake Forest Open Lands, Wildlife Discovery Center and the Lake County Forest Preserve District.

Tickets are $15 ($10 for members of Friends of Ryerson Woods, Conserve Lake County, Lake Forest Open Lands or Wild Ones). Register here.

 

Wolves + Moose in NYT

We invited our friend, Benjamin Goluboff, to submit a guest post to our blog about a recommended read.  We love his mind and we think you will too!  Ben has led our Ryerson Reads book discussion series for eight seasons and is a professor of English at Lake Forest College.

One of the many reasons to be an obsessive reader of the New York Times is the first-rate reporting on wildlife and wildlife conservation that the Times has offered over the years. Since 2010 theTimes has featured a section called Scientist at Work: Notes from the Field. This is a series of blog posts by researchers in various disciplines studying wildlife around the world. The Times calls the series a “modern version of a field journal, a place for reports on the daily progress of scientific expeditions — adventures, misadventures, discoveries. As with the experditions themselves, you never know what you will find.”

Featured scientists have included the Field Museum’s Doug Stotz conducting a biological inventory in Peru’s northern Amazon, and Stanford University’s Caitlin O’Connell-Rodwell studying elephant societies in Namibia. A particularly fascinating blog appeared last year by Roland Kays of the New York State Museum who tracked radio-collared fishers in urban and wild settings around Albany New York. Do Fishers really prey on house cats? Do Fishers really scream? Read Kays and find out.

This winter I have been reading a series of blog posts (just concluded) by John Vucetich a wildlife ecologist from Michigan Tech who leads the wolf-moose Winter Study on Isle Royale National Park. Isle Royale is an island wilderness in Lake Superior. Roadless and accessible only by ferry, Isle Royale is a kayak and backpacker destination in the summer; in winter it is the site of the longest continuous study of predator-prey dynamics in the world. Since 1958 ecologists have monitored the shifting populations of wolves and moose on the island, deriving insights about the life-cycles of both species, and dispelling the myth that predator-prey interactions are governed by the “balance of nature.” Learn more about the Winter Study here: http://www.isleroyalewolf.org/overview/overview/at_a_glance.html

Vucetich’s posts describe a winter spent flying transects over the island and snowshoeing across its interior following the Chippewa Harbor pack as it pursues moose in the island’s deep snows. Along the way we learn something of the personality of the pack, the craft and determination of the researchers, and the shifting emphasis of the long-term study. Vucetich writes: “During the first two decades that scientists observed the wolves on Isle Royale, the predators had a very strong influence on moose abundance. Then climate replaced the influence of wolves over the next two decades. Understanding nature and the lessons of long-term research may require adjusting our sense of what counts as normal.” The writing is crisp and the story is well told. A recommended read for Friends of Ryerson woods, Vucetich’s blog can be found at: http://scientistatwork.blogs.nytimes.com/author/john-vucetich/

Benjamin Goluboff