There’s a small section of the Big Woods where, over the last ten years, I’ve seen and/or gotten photos of a fairly small female black bear that has on multiple occasions given birth to three or more cubs.
The last time I checked one of my camera traps in the Big Woods it had a sequence of photos of a female black bear (possibly the one that’s produced so many offspring) and three cubs reacting to beaver castoreum* that had been painted on a fallen limb. In all, there were well over 80 pictures showing them rolling and laying on the branch.
In the sequence of photos one cub seems fairly indifferent to the odor while the other two spend quite some time at the branch.
The castoreum has attracted a good variety of wildlife: Two days before Mom and the Kids appeared, it was a male bear –
Very early in the morning of the sixth day after the heavy rain, when it was again raining, another bear stopped to smell the branch and was photographed through a rain-smeared lens –
That night two raccoons visited –
Four days later a porcupine ambled up –
The odor of beaver castoreum is obviously irresistible to a wide variety of mammals.
* Beaver castoreum is produced by beavers’ anal glands and is used by beavers to mark their territories.