Michael & Patricia Fogden / Monarch (Danaus plexippus) butterfly, feeding on Scarlet Milkweed (Asclepias curassavica) in the cloud forest, Costa Rica

Michael & Patricia Fogden / Passionvine Butterfly (Heliconius clysonimus) attempting to feed at Crucifix Orchid (Epidendrum radicans) the original mimics Lantana sp and Asclepias curassavica but provides no nectar

Doug Wechsler / Large milkweed bug (Oncopeltus fasciatus) nymphs on Common milkweed (Asclepias syriaca) leaf, Pennsylvania, USA, August.

Doug Wechsler / Mating pair of Large milkweed bugs (Oncopeltus fasciatus) on Common milkweed (Asclepias syriaca) leaf, Pennsylvania, USA, July.

Doug Wechsler / Multicolored asian lady beetle (Harmonia axyridis) eggs and newly hatched larva on Common milkweed (Asclepias syriaca), Pennsylvania, USA, July.

Doug Wechsler / Great spangled fritillary butterfly (Speyeria cybele) two on Common milkweed (Asclepias syriaca), Pennsylvania, USA, June.

Doug Wechsler / Common milkweed (Asclepias syriaca), Todd Audubon Wildlife Sanctuary, Maine, USA, July.

Doug Wechsler / Acrobat ants (Crematogaster ashmeadi) nectaring on Common milkweed (Asclepias syriaca), Pennsylvania, USA, July.

Doug Wechsler / Ant (Crematogaster) attending Oleander / Milkweed aphids (Aphis nerii) beneath a Milkweed (Asclepias lanceolata) leaf, with Dusky ladybird (Scymnini) larvae feeding on them, Philadelphia, USA, July.

MYN / Paul Marcellini / Tuberous milkweed (Asclepias tuberosa) flowers, Florida, USA, April. meetyourneighbours.net project

MYN / Clay Bolt / Butterfly weed (Asclepias tuberosa) in flower, Pickens County, South Carolina, USA, July. meetyourneighbours.net project

LYNN M. STONE / Spicebush swallowtail butterfly (Papilio troilus) feeding on Butterfly weed (Asclepias tuberosa) Old Saybrook, Connecticut, USA, August