Lasiurines such as the hoary bat, red bat, and the silver-haired bat appear to be most vulnerable at North American sites.

The hoary bat (Lasiurus cinereus) is a species of bat in the vesper bat family, Vespertilionidae.

Like other members of the family Vespertilionidae, the hoary bat has a unique bony tail that they use as a sort of "feeler".

Prior to the human arrival, the only native mammals were the Hawaiian hoary bat and the Hawaiian monk seal.

The hoary bat and red bat will often fly in daylight during winter.

The only indigenous mammals are the monk seal and the hoary bat.

Bats include the small big-eared brown bat (Histiotus montanus) and the hoary bat (Lasiurus cinereus).

The reclusive silver-haired bat resembles the hoary bat, but has a "deep chocolate brown color with a white frosting on its back and abdomen".

There has also been one sighting of a hoary bat on the island of Newfoundland.

Their destination was even more resplendent with forests than the paradise we see today, but hoary bats and monk seals were the only mammals in residence.