Information and stories about San Francisco coyotes: behavior & personality, coexistence & outreach, by Janet Kessler: Unveiling first-hand just how savvy, social, sentient and singular coyotes really are!
In the past decade, studies have demonstrated that urban and nonurban wildlife populations exhibit differences in foraging behavior and diet. However, little is known about how environmental heterogeneity shapes dietary variation of organisms within cities. We examined the vertebrate prey components of diets of coyotes (Canis latrans) in San Francisco to quantify territory- and individual-level dietary differences and determine how within-city variation in land cover and land use affects coyote diet. We genotyped fecal samples for individual coyote identification and used DNA metabarcoding to quantify diet composition and individual niche differentiation. The highest contributor to coyote diet overall was anthropogenic food followed by small mammals. The most frequently detected species were domestic chicken, pocket gopher (Thomomys bottae), domestic pig, and raccoon (Procyon lotor). Diet composition varied significantly across territories and among individuals, with territories explaining most of the variation. Within territories (i.e., family groups), the amount of dietary variation attributed to among-individual differences increased with green space and decreased with impervious surface cover. The quantity of anthropogenic food in scats also was positively correlated with impervious surface cover, suggesting that coyotes consumed more human food in more urbanized territories. The quantity of invasive, human-commensal rodents in the diet was positively correlated with the number of food services in a territory. Overall, our results revealed substantial intraspecific variation in coyote diet associated with urban landscape heterogeneity and point to a diversifying effect of urbanization on population diet.
INTRODUCTION
Urban landscapes are complex mosaics of biophysical properties that have been designed to support diverse human activities and requirements (Des Roches et al., 2020). Within cities, transitions in percent cover of impervious surfaces, building density, economic activity, and . . .
Video shows the progression of mange from none in June, and then the case progressing from September through December of 2024.
Just a few days ago, on January 9th, the Chronicle reported that: “Mange outbreak in S.F. coyotes poses risk to pet dogs, officials warn”. Please be informed that mange is transferred through contact, but it has to be through cozying-up or sharing bedding, which our dogs don’t do with coyotes because coyotes and dogs don’t intermingle. A chase, or a nip does not spread mange. I’m surprised that, yet again, both the Chronicle and our City departments have put out sensationalist and fear-mongering information without thoroughly vetting this. This is just more misinformation which will turn folks unnecessarily and wrongly against coyotes.
I’ve spoken to a number of veterinarians and rehabbers who have repeated the same thing to me over and over again. In other words, mange in coyotes poses little risk to dogs.
In addition IF perchance your dog gets mange, it’s easily treated because our pets have ready access to medication and care. This is not true of coyotes. However, I read in Wikipedia that “stressors influence severity and duration of the infection, and that most individuals recover from mange, which helps protect them from future mange infestations. For example, a lactating coyote may look terribly infected with mange, but will likely recover after the pups are weaned and the additional stressors on this coyote are decreased.”
From my own observations: The early signs of mange might be hard to detect in individual coyotes right off. They include crusty eyes, hairless tails and ears, and a sort of splotchy appearance. This progresses fairly rapidly to more and more hairlessness and crusty patches on the skin unless it is arrested by a prescription drug called Bravecto — this is something that can be given them in the wild without intruding or interfering in their lives, without trapping them or bringing them in. If the case is too far along, even this won’t help, and the animal might need a stronger drug called Ivermectin which MUST be given in two doses and with the right timing to work and normally is administered in a rehab center. Few people know coyotes well enough to notice mange in its early stages, and even now, with extremely furless animals, most people are simply reporting that they see very small coyotes.
I’ve watched a number of cases improve over a six to eight week period of time: the biggest improvement is the healing of crusty eyes and a fuller coat. It seems it takes longer for tail and ear fur to grow back.
You can see an improvement and healing of the crusty skin around the eyes.
We have had few cases at all of mange here in San Francisco since 2002 when coyotes suddenly re-appeared in the city after many years of absence due to our having killed them off. Last year, 2024 there was a sudden surge in the condition. From what I’ve seen, the infected animals seem to have came in from south of the city where we saw the first few cases. One of these individuals made it to a park in the heart of the city where he attempted pairing up with an old female whose mate had left her — possibly because she was getting old — I posted this in mid-January. That guy hung around for several weeks and eventually was chased out, but he was there with the family long enough to spread the mite. In mid-January and mid-February I posted images of this mangy fellow on my Instagram account. Long after he left, come May, the female who he had hoped to pair up with had contracted the mite so severely that I could barely recognize her: see the lower photo on the left below and then pair it up to her healthy look months beforehand. It then spread to four more members of that family. I continued to post about mange through the end of last year — my last such posting was in October.
I noticed that mange almost always spreads to family members: it tends to run in families because these are individuals who indeed do cozy up and share their bedding areas. I know several families where every family member has it. I also have seen individuals spoke off from their families and live alone: I don’t know if these individuals have been excluded from their families because of the mange, or if they themselves, in their very uncomfortable situation, went off on their own to better cope with the condition. There’s also the possibility that their leaving had nothing to do with mange. Those that are off on their own are yearlings whose internal call to disperse may have pulled them away from those families. But these individuals are hanging around the periphery of their birth territories for longer than I have usually seen.
So I know of four families that have passed the mite between themselves. But there are families that, so far, knock-on-wood, seem to be totally unaffected by it. In the past we’ve rarely if ever seen mange here in Francisco. Of the individuals I saw, I did not know who they were (they were not members of the families I had mapped) and they were soon gone, leading me to believe that they were dispersing individuals that made it into the city from the south, and then left again once they could not find territories here. It never spread in the city until last year, 2024.
The above healthy coyote photos are the same individuals as the ones right below them with mange.
Animals, too, are affected by fires. Many if not most animals are able to flee most fires if they aren’t aged or ill. And then they try coming back to their homes. I was made aware of this by photos sent to me by Erin Boydston years ago.
The fire in this video was nothing compared to the catastrophic fires occurring in Los Angeles right now, but it shows you a little of their behavior on a much smaller scale, and I think it’s a good time to share it.
Coyotes are very aware of even small changes in their environment. Here, something big has happened and they are checking it out, looking around, spooking, “tasting” it and marking it. It was not until several days after the fire that they would even approach the area. As time goes on, the change will be accepted as the way things are, but initially this is never the case where coyotes are concerned.
I was not there to see the fire as it occurred, and probably neither were these coyotes, or they might have tried putting it out in its early stages! Hope Ryden in her book, God’s Dog, on page 144 refers to an incident she witnessed whereby a coyote put out a small fire:
“Did you know that coyotes put out fires?” The man asking the question had been smoking a cigarette, which is what probably prompted the question to Hope as they observed a coyote. The man proceeded to set an envelope on fire with his cigarette and tossed it in the coyote’s direction. The coyote quickly “pounced on it, and began drumming the flames with her forefeet while bouncing on and off the blaze until only the edges still had sparks”. The fire wasn’t out yet, so the coyote, with its shoulder, pushed the scrap of paper with embers against the ground, then stood up to examine it, and repeated this again. The fire was now out. Apparently all coyotes put out fires — small fires. Wow!! [111008]
[I’ve reprinted this from a previous posting of mine because of the Los Angeles fires]
About My Site and Me: This website reflects my almost 20 years of intense, careful, and dedicated field-work — empirical observations — all photo-documented without interfering or changing coyotes’ behaviors. Be welcome here, enjoy, and learn! I am a self-taught naturalist and independent coyote researcher.
Coyotes reappeared in San Francisco in 2002 after many years of absence, and people are still in the dark about them. This site is to help bring light to their behavior and offer simple guidelines for easy coexistence.
My information comes from my own first-hand observations of our very own coyotes here in San Francisco. What I’m presenting to you is the reality of their everyday individual lives. They have not been studied or observed so thoroughly by anyone else. Mine is not generic information, nor second-hand.
Note that none of the coyotes I document and photograph is “anonymous” to me: I know (or knew) each one of them, and can tell you about their personalities, histories, and their family situations. There have been over 100 of them, distributed among over twenty families, all in San Francisco. Images and true stories have the power to raise awareness and change perspective.
