Territories & Population in SF

Abstract: Key summary concepts and conclusions, for full article, click the link below:

  1. Coyote population in San Francisco is self-regulated.
  2. There are just about 20 coyote territories in the city.
  3. working on territory map 7-9-
  4. Territories are owned and occupied by just one family.
  5. Outsider coyotes are kept out of these territories with few exceptions.
  6. Each territory within San Francisco is 1.5 to 2.5 square miles.
  7. Each territory has been stable since I first observed them, some since 2007, some since 2014, with minor exceptions. 
  8. Families consist of the alpha pair (Mom and Dad), pups born this year, and possibly a couple of yearlings from last year’s litter. There are variations, and a few exceptions as discussed below.
  9. This map and the work behind it has been assembled by me, visually, working alone up until this year, using my facial recognition of coyotes, and through documenting their behaviors and family life — I know each of these families and the relationships (and often ages) of the coyotes within the families — without tags or radio collars. Mine is a private passion. I have not been associated with any agencies, and I’m not paid for my work.
  10. I’ve been collecting scat since 2008 for DNA analysis at Dr. Benjamin Sacks’ Genetics Lab at UC Davis to confirm the relationships I’ve seen, dispersals, and origins. Last year my project was turned into a collaborative effort, joined by Monica Serrano who is analyzing the DNA, and Tali Caspi who is also collecting scat for a diet study: both students are PhD candidates working with or through Dr. Benjamin Sacks’ lab at UC Davis.
  11. **I want to emphasize that this posting is about what the situation is now and what it has been, I’m not predicting what it will be moving forward, but this is what we have as of Summer, 2021.                                 

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