Coyote Communication: Potent and Effective

This series of photos shows Mom on the right letting Dad on the left know what she feels about what he’s doing. One of their youngsters is there, in the middle, looking on, and obviously anxious about how their “conversation” is going. Coyotes communicate constantly through eye-to-eye contact, facial expressions and body language. They are always aware of each other’s moods and intentions, and most of their communication is silent like this, though sometimes these might include quieter grunts and growls.

Top row: Dad had been lazily relaxing in the aftermath of a rain, when Mom approaches from the right. He’s taking it in stride, with his ears pulled back and focused eye-contact which shows he’s really listening. Notice how intently pup, in the middle, listens to it all and is upset about it’s intensity as shown by the anxiety in his face. He shows his nervousness by licking his lips.

Middle row left, pup is kept quiet and out of the conversation — or maybe even calmed down — by Mom who grabs his snout: this is usually a disciplinary move and reasserts her status and will over his. At this point, pup steps back but continues to be totally focused and absorbed in his parent’s “conversation”.

Bottom row: On the left is when they become aware of me: “Oh, hi over there!” But they’ve come to know me as a benign fixture in the distance, so their conversation resumes. It appears that Mom wanted Dad to get moving because she beckons him to follow and leads him away. Dad complies, and pup trotted along in back of them.

Another conversation that might interest you is this one: Coyote Conversation: An Example. These communications are very directed in their messages: they have a specific intent and planned outcome by the coyote delivering the message, and the message is understood absolutely by the recipient.

Besides eye-to-eye contact and all sorts of body language including physical arm pokes, coyotes also use smells to communicate: this is a whole different channel of communication that we “mere” humans do not have access to except in academic studies. In fact, in our terms, coyotes almost “see” with their noses. They produce and detect pheromones which convey all sorts of specific information, including territorial boundaries through urine scent marking, the presence of outsider coyotes including their meekness or boldness, reproductive status and gender, they can identify specific coyotes who have passed by even days beforehand, and they can smell injuries in each other. And, of course, much more.

In this photo here, it’s interesting to see how a parental communication to one youngster so thoroughly affects an onlooker pup. They, of course, can identify with the situation they are watching.


© All information and photos in my postings come from my own original and first-hand observations and documentation work which I am happy to share, with permission and with properly displayed credit: ©janetkessler/coyoteyipps.com.

Using DNA in Scat to Study Coyote Diet, by Tali Caspi

Traditionally, ecologists study diet either by directly observing what animals are eating, or by dissecting animal scat and looking for prey remains. However, these methods have some challenges and limitations. For one, it takes a lot of time and effort to observe wild animals, and though we may be able to observe them foraging, it can be hard to see everything they eat and estimate the relative amounts of different foods consumed by different individuals. Regarding dissection, this method relies on there being undigested parts in the scat left behind – for example fur or bones which are used to identify the species consumed. However, in cities, animals have access to a lot of foods that may not leave anything visual behind in the scat for us to identify. For example, a chicken nugget won’t leave any chicken bones or feathers behind! However, it will leave some chicken DNA behind. This is where a more recent technology for studying diet, known as DNA metabarcoding, is very useful. This method allows scientists to quantify and characterize the diet of animals by first amplifying the DNA present in the scat and then identifying which species that DNA belongs to.

As part of my dissertation research for my PhD in ecology at UC Davis, I am using DNA metabarcoding to identify the species that coyotes in San Francisco consume, estimate which food items are the most frequently eaten, and consider how the diets of coyotes differ depending on where in the city they live. I’m still completing my data analysis, but I have some tidbits to share!

First, coyotes in San Francisco eat a lot of food provided by people, such as domestic chicken and pig – this could be coming from pet foods, garbage, or meat people intentionally put out for coyotes. As Janet has described in her blog many times, this isn’t good. Not only can these foods lack the nutritional content that coyotes need to thrive, but the presence of these foods brings coyotes into closer contact with people, which can lead to interactions between people and coyotes that are undesirable. Securing garbage, not leaving out attractants like fallen fruit and pet food, and making sure to never feed wildlife help decrease the quantity of these foods in coyote diets.

Second, coyotes in San Francisco eat a lot of pocket gophers—they are experts at hunting gophers, which are present throughout most of the city. Other frequently consumed natural prey includes raccoons, voles, and rats.

Finally, although coyotes in San Francisco do eat domestic cats, it’s not as common as many people think: I’m only detecting cats in <5% of the scats I’ve collected. Still, from the standpoint of cat welfare, it’s always a good idea to keep pet cats indoors. Not only does this keep your cats safer, but it protects wildlife and is better for human health and the environment. More to come!

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Happy New Year, 2024!