Thousands invading after rain
October 15, 2009
We wonder what these are and where they are coming from (most likely). After rains this past 2 years they come in under the door by the hundreds and die on the floor. The backyard patio of covered with their dead bodies.
Ventura, California, USA
Dear Creeped Out,
This is a terrestrial amphipod known as a Lawn Shrimp or House Hopper. The behavior you describe is very characteristic. This species lives in ground covers like ivy, and after a heavy rain, thousands of individuals will seek shelter indoors to die shortly afterward.