Lygaeus equestris, common name black-and-red-bug, is a species of seed bugs belonging to the family Lygaeidae, subfamily Lygaeinae.

The hemelytra have two transverse bands that reach the margin and a round white spot on the membrane.

This species is very difficult to differentiate from Lygaeus simulans, that has a scutellum with long bristles, antennae with angulous tubercles and a larger red area on the head.

The nymphs and the imagos feed on juices of various plants, particularly milkweed (Vincetoxicum hirundinaria),[2] Taraxacum species,[3] Spring pheasant's eye (Adonis vernalis) and sometimes also on dandelions.

[2] It is mainly present in Albania, Austria, Belgium, Bosnia, Bulgaria, Brazil, Croatia, Czech Republic, Denmark, Finland, France, Germany, Gibraltar, Greece, Hungary, Italy, Montenegro, North Macedonia, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Slovenia, Spain, Sweden and Switzerland.