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Coyotes-Wolves-Cougars.blogspot.com

Grizzly bears, black bears, wolves, coyotes, cougars/ mountain lions,bobcats, wolverines, lynx, foxes, fishers and martens are the suite of carnivores that originally inhabited North America after the Pleistocene extinctions. This site invites research, commentary, point/counterpoint on that suite of native animals (predator and prey) that inhabited The Americas circa 1500-at the initial point of European exploration and subsequent colonization. Landscape ecology, journal accounts of explorers and frontiersmen, genetic evaluations of museum animals, peer reviewed 20th and 21st century research on various aspects of our "Wild America" as well as subjective commentary from expert and layman alike. All of the above being revealed and discussed with the underlying goal of one day seeing our Continent rewilded.....Where big enough swaths of open space exist with connective corridors to other large forest, meadow, mountain, valley, prairie, desert and chaparral wildlands.....Thereby enabling all of our historic fauna, including man, to live in a sustainable and healthy environment. - Blogger Rick

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Monday, February 4, 2019

Coyotes historically have been described as having golden-brown colored eyes...............Recently Blue-eyed Coyotes have been photographed in central and northern California(Sacramento, Santa Cruz and Point Reyes)............"Researchers think the phenomenon is the result of a naturally occurring genetic mutation, likely one that appeared a few generations ago".............."The new blue-eyed coyotes may be descendents of the original mutant".............."Blue eyes could be disadvantageous to coyotes, making the animals more visible to predators and possibly increasing light sensitivity".........."But the trait might be cropping up more frequently now because selective pressures on coyotes have eased off as humans have killed or otherwise eradicated their predators, like wolves and mountain lions"................"Transient coyotes, which leave or are forced out of their family groups, may be responsible for spreading the trait among California coyotes"............."These lone canines tend to traverse large geographic ranges until they are accepted by another pack or form their own"............"But there needs to be much more research before people make wide-ranging pronouncements about what’s happening"

https://www.smithsonianmag.com/smart-news/rare-blue-eyed-coyotes-spotted-california-180971383/

Rare Blue-Eyed Coyotes Spotted in California

Brigit Katz; jan 30, 2019

Coyotes’ eyes are consistently golden-brown, so researchers have been surprised to learn of five California coyotes with piercing baby blues

When wildlife photographer and guide Daniel Dietrich snapped a picture of a blue-eyed coyote in Point Reyes National Seashore, experts were shocked by its brilliant blue peepers. Eye color tends to be consistent in wild animals; among coyotes, that color is golden-brown.
 (Daniel Dietrich--)     A rare, blue-eyed coyote (






“I’ve never seen this,” Juan J. Negro, a researcher who studies animal eye color, said of the photo during an interview with National Geographic’s Callie Broaddus last year.
But it seems that the trait, though still rare, is becoming more common among the coyotes that roam through Northern California. As Noor Al-Samarrai reports for Atlas Obscura, five blue-eyed coyotes have now been documented in the region: two in Point Reyes, the other three in Santa Cruz and Sacramento.





Due to selective breeding, blue eyes are not unheard of among domestic canines. Recently, in fact, scientists were able to pinpoint a genetic mutation that may give Siberian huskies their defining baby blues. But while domestic dogs and wild coyotes have been known to interbreed, experts don’t think such unions are behind the blue-eyed coyotes in California. So-called “coydogs,” as coyote-dog hybrids are known, tend to have distinctive coat colors and facial structures—but not blue eyes, Broaddus reports in a second National Geo article.
Instead, researchers think the phenomenon is the result of a naturally occurring genetic mutation, likely one that appeared a few generations ago. The new blue-eyed coyotes may be descendents of the original mutant. As Negro tells Broaddus, blue eyes could be disadvantageous to coyotes, making the animals more visible to predators and possibly increasing light sensitivity. But the trait might be cropping up more frequently now because selective pressures on coyotes have eased off as humans have killed or otherwise eradicated their predators, like wolves and mountain lions.

 Carter Cremer photo




Transient coyotes, which leave or are forced out of their family groups, may be responsible for spreading the trait among California coyotes. These lone canines tend to traverse large geographic ranges until they are accepted by another pack or form their own. But there “needs to be much more research before people make wide-ranging pronouncements about what’s happening,” Marc Bekoff, an ecologist and evolutionary biologist at the University of Colorado, tells Al-Samarrai.





Regarded as livestock-killing pests, coyotes are often the target of government culls and civilian hunts—measures that overlook coyotes’ important role in keeping small herbivores in check and are generally ineffective at reducing livestock predation. California prohibits “coyote killing contests,” and for now, the state’s blue-eyed coyotes seem to be faring well, which could mean that we’ll be seeing more of them in the future.

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