Red-and-black true bug (likely a firebug)

Ground and vegetation in sunny, dry areas, often near lime trees or mallows.

Mostly feeds on seeds, especially fallen lime and mallow seeds; may also consume plant material and dead insects.

Often gathers in conspicuous groups; adults and nymphs overwinter in sheltered places and become active in warm weather.

Harmless to people and generally causes little plant damage; helps recycle seeds and organic matter.