It's not unusual for grizzly bear sows to give birth to two cubs, and on occasion three, but when was the last time you heard of a sow having quadruplets? Well, it happened in Yellowstone National Park this year.
Thanks to a Tweeted story by "Yosemitegal," aka Beth Pratt, about Yellowstone's bear populations this year, a little searching has turned up the following videos from YouTube featuring the sow and her cubs.
The footage in the following collection shows just how inquisitive and playful bear cubs can be.
This first video, obviously a nicely produced piece, surfaced back in May:
This video, shot in June, shows the bears aren't timid...and that park visitors can be a bit foolish in how close they get to grizzlies:
This video, also made in June, shows mom isn't above giving one of her cubs a piggyback ride:
And here's Yosemitegal's footage, shot near Swan Lake Flats, also in June: