About Hydrophilus triangularis Say, 1823
Hydrophilus triangularis Say, 1823 is a species of water scavenger beetle that belongs to the family Hydrophilidae. It is commonly known as the giant black water beetle or the giant water scavenger. This species is the most common and widespread member of the genus Hydrophilus found in North America. Its range covers the contiguous United States, southern Canada, and Mexico.