monarch butterfly caterpillar on milkweed leaf

aesclepias animal animals antennae beautiful beauty biology black bright butterflies butterfly caged captivity caterpillar caterpillars close closeup closeups colorful copy crawling danaus daytime eating eye feeding green growing handraised insect insects larva larvae late latestage leaf leaves lepidoptera level macro macros milkweed monarch monarchs munching natural nature nobody plexippus science season seasonal space striped summer syriaca yellow