These 21 species have been declared extinct, the U.S. Fish and Wildlife Service says
The species join a list of 650 others that are extinct in the U.S.
Some female frogs play dead to avoid unwanted male advances, study says
Female frogs may take extreme measures to avoid the pile-up that frequently happens during “explosive" mating in the spring, according to the researchers.
Please don't paint 'pet' on wild deer, Missouri officials warn
Authorities say deer should never be considered pets – and they shouldn’t be moved from their natural habitat because of disease.
Bear euthanized after charging 2 boys in Colorado, 1 cub survives capture
In a recent incident in Colorado Springs, a bear charged at two boys aged 12 and 13, prompting wildlife officials to respond.
Watch: Bodycam footage shows deputies rescuing elk tangled in tree swing
When the deputies arrived at the scene, they saw the bull elk, or male elk, frantically running back and forth behind the tree where the swing was attached.
Idaho elk hunter shoots, kills charging grizzly bear in 'surprise encounter': officials
Idaho wildlife officials determined hunter killed grizzly bear in self-defense.
Watch: Moose enjoy festive fall dip in Colorado lake amid stunning autumn foliage
In early October near Steamboat Springs, Colorado, a heartwarming scene unfolded as a group of moose was discovered frolicking in a picturesque lake, surrounded by vibrant fall foliage.
Thousands of birds dead in Utah after suspected avian botulism outbreak
Thousands of birds in northern Utah have died due to a recent outbreak of wildlife officials believe is avian botulism.
Warning: Palos Park police caution against deadly Jack-o-Lantern mushrooms
They're orange, glow at night and can be deadly if they are eaten.
Watch: Tennessee couple rattled by venomous snake found nesting in baby's stroller
A Tennessee couple was left in shock recently after they found a venomous copperhead snake nesting in their baby's stroller.
Watch: Historic banyan tree, scorched during Maui wildfires, sprouts new leaves
The historic banyan tree, which was scorched during the wildfires in Lahaina in August, began to sprout new leaves this month.
Swarm of bees kill Kentucky man moving potting soil bag from porch, coroner says
Beekeepers warn if you ever find yourself where bees are attacking you, the most important thing to do is protect your face and run indoors or get into a vehicle. Those who study bees' behaviors also warn not to fight the insects because they have the advantage of numbers and the gift of flight.
Alaska fisherman hooks and cooks blue-fleshed fish: ‘Mother Nature is incredible’
Weighing only up to 2 lbs., rock greenlings may not sound like an impressive catch. But once you see one, it’s clear these little fish are worthy of the chase. Would you eat it?
Watch: Boaters get incredible front-row seat to humpback whale feeding frenzy
"Discovery Channel, eat your heart out," the captain joked as the boat riders watched in awe.
Alaska hiker rescued thanks to viewers spotting him on bear webcam
In a dramatic rescue in Alaska, a lost hiker was saved thanks to the vigilance of viewers who spotted him on a bear webcam.
Rhino kills zookeeper and seriously injures her husband
The rhino killed the zookeeper and seriously injured another zookeeper, her husband, as he tried to chase the rhino away from her.
Grizzly bear that mauled Montana hunter goes missing, prompting all-out search
Officials have closed part of the Custer Gallatin National Forest in southwestern Montana after a hunter was severely mauled by a grizzly bear.
Tennessee officials warn public after people get 'dangerously close' to bear
The bear wandered the steps of the building as dozens of people stood by. But some came within mere feet of the wild animal, with their phones out to get a closer look.