variable checkerspot euphydryas chalcedona sipping nectar from thistle flower.

alameda america animal antenna area bands beautiful black blooming brown butterfly california chalcedon chalcedona checkered checkerspot closeup colorful county delicate detail entomology environment euphydryas fauna feeding flora flower francisco garden insect leaf lepidoptera macro nature nectar north nymphalidae orange outdoors pollination pretty spotted springtime summer thistle variable western white wild wildflower wildlife wing