Blood-vein

The Blood-vein has pale straw yellow wings crossed by a thin, reddish-pink line that runs diagonally across both fore and hindwings, giving the species its name. A fine dark dot sits near the center of each wing, and the wing margins are edged with a faint reddish fringe.

Two generations fly each year, one in late spring and a second in late summer, with a possible third generation overlapping the first two in warmer southern areas. Caterpillars feed on low plants such as dock and knotgrass in damp grassy places.