Predaceous diving beetle

7040.        Found at night, inside my house, in the bathroom. August 2020. 23 degrees Celsius outside. Oshawa, Ontario. Canada

Number 7040. This is a predaceous diving beetle (Coleoptera: Dytiscidae). They and their larvae (“water tigers”) are general predators on other small aquatic life forms. They also are very strong fliers, and may be found quite some distance from any water source.