there are three species of amphibians on the island. the slender salamander ("batrachoseps attenuatus") is found in the north and east of the island, where the soil is damp most of the year. the arboreal salamander ("aneides lugubris") is represented by a small population around the pond in the former quarry on the southern shore. the pacific tree frog ("pseudacris regilla") has also been reported from brooks island, but it is unclear whether there is a breeding population.