bay checkerspot butterfly (euphydryas editha bayensis) resting in the grass; classified as a federally threatened species, san

america area bay beautiful beauty blooming bright butterfly california checkerspot colorful critically day delicate endangered euphydryas editha bayensis flowers fly fragile grass green ground insect lasthenia californica meadow natural nature resting san francisco season seasonal small specie spread spring springtime sunny threatened time two vibrant view from above vivid wild wildlife wings yellow