Just days before the Woolsey Fire started last November, a young bobcat was captured and collared so biologists could keep track of her. The fire went on to burn nearly 100,000 acres in Los Angeles and Ventura counties.

Biologists from the Santa Monica Mountains National Recreation Area found that bobcat B-362 had relocated to an area of dense vegetation in a large backyard in Westlake Village, a city about 10 miles from Thousand Oaks. She recently gave birth in her new home to four kittens: B-364, B-365, B-366 and B-367.

bobcat kitten in grass The bobcat den was in an area unaffected by the fire. (Photo: National Park Service/Flickr)

After tracking the bobcat using signals from her collar, biologists got permission from the homeowner to access the new mother's den. While the cat was away, they weighed the kittens, measured them and gave them a basic health checkup. They also tagged their ears so they could identify them in the future.

bobcat kitten being measured Each bobcat kitten was measured and weighed. (Photo: National Park Service/Flickr)

B-362’s kittens are approximately 4 weeks old. There are three females and one male. The male is the smallest in size and weight in this litter. Their weights range from less than a pound to 1.5 pounds.

"This cat first had to deal with her habitat getting completely burned in the fire and then finding a new home in an unburned area," said biologist Joanne Moriarty, who has been studying bobcats in the area for more than 15 years. "She chose a den in thick brush where she could keep her kittens safe."

bobcat kitten being carried The kittens were approximately 4 weeks old. (Photo: National Park Service/Flickr)

Moriarty said she was happy to see a bobcat have kittens, particularly after such a difficult period for the area. She said it has been a stressful time for wildlife, "but we're happy to see her thriving despite the challenges."

The mother bobcat, B-362, was originally captured for tagging in a preserve in Thousand Oaks that burned in the Woolsey Fire. She left the area during the fire and has been living in an unaffected location nearby.

bobcat kitten with info card The kittens were photographed, weighed, measured, tagged and given health exams. (Photo: National Park Service/Flickr)

The other female bobcat that researchers are following in the study has remained in the area burned by the fire and does not appear to have had kittens. Researchers say she likely won't reproduce this year, but it's too early to know for sure.

bobcat kitten held in gloved handThe kittens weighed from less than a pound to up to 1 1/2 pounds. (Photo: National Park Service/Flickr)

Bobcat kittens typically stay in the den where they were born for about four or five weeks, then their mother will move them to other dens for brief periods. Researchers aren't certain why they do this, but think it's probably to avoid predators.

A mother bobcat will keep kittens in the den until they are about 12 weeks old, then they will start following her as she hunts and goes about her daily activities. The kittens will stay with their mother until they are between 9 and 11 months old. Then they will gradually become more independent, but still check in with their mother from time to time.

Mary Jo DiLonardo writes about everything from health to parenting — and anything that helps explain why her dog does what he does.

Bobcat displaced by California's Woolsey Fire gives birth to 4 kittens
After a fire ravaged her home, a California bobcat relocated and gave birth to 4 kittens.