Tag: mortality

December 21, 2021

TWS2021: What affects bobcat kitten survival?

Even though there are no are no management plans or harvest limits for bobcats in the Black Hills of South Dakota, researchers don’t know much about how the populations—particularly kittens—are...

August 9, 2021

Lead poisoning leads to spike in condor deaths

Lead poisoning has contributed to an unusually high number of California condor mortalities this year. The Ventana Wildlife Society, a nonprofit organization involved in restoring the endangered species, reports that...

July 26, 2021

California system keeps an eye out for wildlife illness

A new surveillance system in California may help identify unusual patterns of wildlife illness and death as they unfold by tapping into data from wildlife rehabilitation organizations across the state....

April 26, 2021

Traveling doesn’t pose mortality risk for white-tailed deer

White-tailed deer that disperse to new areas have similar rates of mortality as those that stay put, researchers found. That wasn’t what they expected to discover. They figured dispersal would...

February 6, 2020

JWM: Vehicles, lead poisoning cause Michigan bald eagle deaths

An analysis of more than three decades of necropsy data show that vehicle collisions and lead poisoning are the main causes of death for Michigan bald eagles. The Michigan Department...

July 11, 2019

JWM: Wolves reduce elk survival — but they’re not alone

As gray wolf populations rose in Idaho, hunters became concerned about what those predators on the landscape might mean for elk numbers. As researchers looked into it, they found a...

May 22, 2019

Can sound keep birds and bats from hitting wind turbines?

Could whistles deter bats from hitting wind turbines? Could loudspeakers keep eagles away? Those were two of the techniques proposed at the 177th Meeting of the Acoustical Society of America...

November 8, 2018

What’s killing desert bighorn lambs?

When New Mexico removed desert bighorn sheep (Ovis canadensis mexicana) from the state’s list of threatened and endangered species, biologists had a pretty good sense of what caused adult sheep...

June 15, 2018

Mating bats go for the silent treatment

Giving someone the “silent treatment” during courtship might not be the best strategy for romance. But new research shows hoary bats (Lasiurus cinereus) fly with little or no echolocation at all as...

June 6, 2018

JWM: Harvest may not impact where wolves rear pups

How does hunting affect where gray wolves (Canis lupus) bring up their pups? A new study from Idaho suggests that despite the presence of hunters, wolves rear their offspring in...