The swarm showed up on Southern California weather radar.
A huge blob that appeared on the United States' National Weather Service's radar wasn't a rain cloud, but a massive swarm of ladybirds over Southern California.
Meteorologist Joe Dandrea says the array of bugs appeared to be about 130km wide as it flew over San Diego Tuesday.
But Dandrea told
the Los Angeles Times that the ladybirds are actually spread throughout the sky, flying at between 5000 and 9000 feet (1525 and 2745m), with the most concentrated group about 16km wide.
It wasn't immediately known what type of ladybird was causing the phenomenon.
The Times says one species, adult convergent lady beetles, mate and migrate from the Sierra Nevada to valley areas where they eat aphids and lay eggs.
