Although rarely seen due to its secretive behavior, it can be found in large numbers in wet areas.

The exact number of this species is unknown because of its secretive behavior and wide distribution.

Because of their secretive nocturnal behavior, it is extremely hard to get an accurate national hedgehog count.

The sisters were known for dressing in black at almost all times and for their secretive behavior.

It is secretive, furtive, deceptive behavior designed to deliver a jolt.

Where extant, these frogs are probably more abundant than people realize, because of their highly secretive behavior.

But there had to be some explanation for her mother's strange, secretive behavior.

Before this time societies pressured scientists into secretive behaviors.

Elaine's new boyfriend puzzles and intrigues her with his secretive behavior.