Wolves and Deer

Information on the Relationship Between Wolves and Deer
News

... WDFW is beginning a study to collar wolves, cougars, bobcats, moose, deer and elk to track predator and prey interactions. There has been no baseline assessment to understand how a wolf's prey, like deer, elk, etc. have changed as wolf numbers have grown...

... in 1960:  on Coronation Island  ... a high density of blacktailed deer and no wolves... biologists from Fish and Game released two pairs of wolves ... in 1964:  at least 13 wolves...  in 1965:  no sign of deer on the north side of the island ... February 1966:   only three wolves ...wolf scats ... suggesting the animals had resorted to cannibalism ... August 1966:   just three sets of fresh deer tracks... in 1983: no evidence of wolves, but the deer were once again plentiful...

... Washington Fish and Wildlife will again target a wolfpack preying on cattle in the Kettle River Range ... Cattlemen say the wolves have thinned deer herds and turned to cattle for food...
Research

... a recently published study based on information collected in Yellowstone National Park shows that elk use much the same behavior to avoid mountain lions and wolves... Dan Stahler, Yellowstone Cougar Project manager...

... 15 years of data collected on Idaho’s wolf and elk population... found that wolves accounted for 32% of identified mortalities for female elk while mountain lions accounted for 35%. That disparity grew when looking at elk calf survival with wolves accounting for 28% of known-fate deaths and lions accounting for 45%...
... a new study has found that the secretive cougar is actually the main predator influencing the movement of elk across the winter range of northern Yellowstone National Park... "Cougars hunted mainly in forested, rugged areas at night, whereas wolves hunted mainly in grassy, flat areas during morning and at dusk" ...

SL Berry, LA Shipley, RA Long, C Loggers - Ecosphere, 2019 Washington
... About 90% of the diets consumed by both deer species consisted of deciduous shrubs and forbs, and they selected many of the same plant species. However, overall diet composition was 38% dissimilar, with mule deer consuming diets that were more likely to contain shrubs with higher levels of tannins and lower levels of dry matter digestibility than diets eaten by white‐tailed deer...
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