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Coyotes again — or possibly coywolves

Wikimedia-Coyote2008Oak Ridgers have coyotes on their minds again.

The last time this animal was a hot topic was 2006-2007. The city Environmental Quality Advisory Board (EQAB — I was chairman then and I’m a board member again now) had long discussions of coyote sightings, disappearances of pet cats, etc. We learned that the Tennessee Wildlife Resources Agency (TWRA), not city animal control, has jurisdiction over wild critters like coyotes. EQAB members studied up on the biology of coyotes and their management. We concluded that these animals are here to stay, and that the best way for the City to deal with them would be to help residents get good advice on coexisting with these animals.

It doesn’t look like very much has changed since 2007. The only new wrinkle is the information, based on scientific research in the northeastern U.S., that the coyotes in the eastern states may be “coywolves” — the result of crossbreeding between coyotes and eastern coyotes. (Read all about it at easterncoyoteresearch.com.) Also, now we have an Oak Ridge coyote tracking page on Facebook.
February 5, 2014 update: Warren Webb has supplied the information, from the Chattanooga Nature Center, that genetic research has found that our coyotes have less wolf in them than coyotes in the northeast: “Midwestern and Southeastern coyotes were genetically 90% coyotes, with an average 7.5% dog and 2.5% wolf.” In the northeast, they were “82% coyote, 9% dog, and 9% wolf.”

Back in 2007, EQAB member Liyuan Liang drafted an informational article on coyotes and how to live around them. Her article was submitted to the Oak Ridger as an EQAB contribution and published on May 21, 2007.  I found a slightly earlier draft of that article in my files, plus an information piece produced in 2008 by the Oak Ridge National Lab (ORNL) wildlife management staff, and I’ve pulled out some excerpts that I think are just as good to read in 2014 as they were in 2007 and 2008:

When did coyotes show up in Oak Ridge?

From ORNL: Historically known as an animal of the wild-west, the adaptable coyote has expanded its range into eastern North America while other carnivore populations (e.g. , wolves) have declined. Coyotes are now found in every corner of the United States, and they shift their behaviors to fit new habitats.

The first coyote probably crossed the Mississippi River into Tennessee around 1965. On the Oak Ridge Reservation (ORR) the first reported sighting of a coyote was in 1978, and the first coyote road kill happened in 1984. That same year, a pair of coyotes were observed raising a litter of pups on the east end of the reservation. In 1987 a pair of coyotes were trapped on the ORR and equipped with radio collars. They were radio-tracked for nine weeks during which time they ranged over an almost 4-square mile area. In 1990 ORNL researchers estimated that approximately 12 to 16 coyotes existed on the reservation. … Using known population densities from studies in other areas of the country, it is estimated that the reservation could potentially support as many as 50 or more coyotes.

Why are coyotes here now, when we didn’t have them before?

From the EQAB article: People unwittingly helped coyotes flourish when they exterminated most of the wolves in the United States. Coyotes became top dog, filling the wolf’s ecological niche. Deforestation and agriculture opened up previously dense tracts of forest, and human settlements, with their garbage, vegetable gardens, compost piles and domestic pets, provided food.

Describe the coyote’s “lifestyle” and what they eat.

A typical group of coyotes consists of a breeding pair and their offspring. The family group is largest in the summer when the pups, parents, and non-breeding adults are together at their den. Coyotes den in a variety of places, including brush-covered slopes, steep banks, rock ledges, caves, thickets, and hollow logs. Dens of other animals (such as groundhogs or foxes) are frequently used. In urban areas dens may include storm drains; culverts; holes in vacant lots, parks, and golf courses; and under storage sheds or porches.

Coyotes breed during January through March and typically produce five to six pups 60 to 63 days later. The entire family unit, including the mother, father, and other non-breeding family members, helps raise the young by providing food. Young coyotes begin dispersing in October and may travel up to 100 miles from their birthplace.

Coyotes are active mainly during the nighttime, but they can be moving at any time during the day.  Most sightings of coyotes occur during the hours close to sunrise and sunset.

They communicate through a series of yips, barks, and howls. A common call of the coyote is two short barks followed by a long wavering yodel known as the howl.

Adult males have large territories (15-25 square miles) in which they roam; adult females occupy areas of six to ten square miles. The availability of food affects territory size. Contrary to popular belief, coyotes do not hunt in packs. They are relatively solitary hunters, but they may hunt in groups when food is plentiful. They may also form packs to defend territories.

The coyote will eat almost anything, including rodents, rabbits, muskrats, groundhogs, squirrels, skunks, raccoons, songbirds, insects, watermelons, apples, and persimmons. They prefer fresh kills but will eat carrion. Recent studies have also shown that coyotes eat Canada goose eggs, goslings, and occasionally adults. Coyotes may take as many as 70 to 80 percent of the fawns of urban deer. Unfortunately, in urban areas their diet may also include garbage, pet food, cats, and small dogs.

When we see coyotes in neighborhood streets and yards, in the daytime, does that mean they are desperate for food, and dangerous?

In urban areas where coyotes aren’t hunted or trapped, they may lose their fear of humans. If they associate people with an easy and dependable source for food, they can become very bold. They will come up to the door of a house if food is regularly present. Coyote attacks are, however, extremely rare in contrast to the 4.7 million dog bites recorded in the United States each year. A person is millions of times more likely to get attacked by the family dog than by a coyote.

Wouldn’t it be a good idea to get rid of Oak Ridge’s coyotes by capturing them and killing them?

Eliminating individual coyotes doesn’t control their population. Remember that they produce litters of 5 or 6 pups. They also produce more young when their populations are low. This makes it very difficult to reduce coyote numbers. Scientists have determined that it would require removing nearly 70 percent of the population every year to maintain a sustained population reduction.

If we can’t rid of them, what we do to reduce the problems coyotes cause for our families and our pets?

* Do not feed coyotes!
* Eliminate sources of water. Water attracts rodents, birds, and snakes that coyotes feed on.
* Position bird feeders  so that coyotes can’t get the feed.  Coyotes are attracted by bread, table scraps, and even seed.  They may also be attracted by birds and rodents that come to the feeders.
* Do not discard edible garbage where coyotes can get to it.
* Secure garbage containers and eliminate garbage odors.
* Place trash cans out on pickup day. Putting them out the night before allows coyotes to scavenge under cover of darkness.
* Do not leave barbeque grills outside and uncovered. Food smells from the grill will attract coyotes.
* Feed pets indoors whenever possible.  Pick up any leftovers if feeding outdoors.  Store pet and livestock feed where it is inaccessible to wildlife.
* Trim and clear, near ground level, any shrubbery that provides hiding cover for coyotes or prey.
* Fencing your yard could deter coyotes.  The fence should be at least 6 feet high with the bottom extending at least 6 inches below ground level for best results.
* Don’t leave small children unattended outside if coyotes have been frequenting the area.
* Don’t allow pets to run free.  Keep them safely confined and provide secure nighttime housing for them.  Walk your dog on a leash and accompany your pet outside, especially at night.  Provide secure shelters for poultry, rabbits, and other vulnerable animals.
* Discourage coyotes from frequenting your area.  If you start seeing coyotes around your home or property, chase them away by shouting, making loud noises or throwing rocks.

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2 Comments

  1. Andrew Howe says:

    Thanks for digging up the local documentation and data, Ellen.

    I created a Facebook page for people to post the locations of sightings – a crude way to start monitoring. If enough people post, I’ll put the locations into an online GIS map. It may help focus any work needed to deal with them.

    https://www.facebook.com/OakRidgeCoyoteTriangulation

    Part of the reason I wanted to track sightings is because they don’t seem to be in the Jackson Sq area, where I live (or at least they don’t vocalize here).

    So far, based on what I’ve seen on Facebook, and on my bushwacking adventures, they’re where you would expect, nearer to the wooded areas on the edge of town – the west end, the north side of Black Oak Ridge. I did find numerous droppings when I recently hiked through the brush along the stream that runs from the post office on Admin Rd to Melton Lake.

    There’s enough open land around town that they have options for denning sites far from habitation, however two years ago I found two pups in a den along the North Ridge Trail, that was probably only a third of a mile from West Outer.

    If you’d care to join me, or know of someone else who would, I’ll be out scouting for pups in a few weeks.

    Kudos to you, once again, for pulling up data!

  2. Erin brockvich says:

    How many animals were tested?in the north and in the south?was it a particular scrawny or large sized group of specimens of test subjects?we can add up the numbers anyway we wish.someone can give you the numbers that you want to hear.the numbers are only as good as the person doing the testing.genetic research is barely coherent to modern research. just beginning to understand it. You can look at the northeastern variety and compare it to the southern and western variety of yotes and plainly see the difference.there has been 60 plus pound coyotes in the Midwest for years.and when you see their face,coat,width of their scull,length of their nose ,long legs and muscle you know the difference.their eyes give it away if nothing else.come on people.

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