Marie Read / Common Redpoll (Carduelis flammea) male perched on milkweed stem (Asclepias sp) and seed pods in winter, New York, USA, against white background.

Larry Michael / Seed dispersal of Common milkweed {Asclepias syriaca} Wisconsin, USA

Doug Wechsler / Common milkweed seed pods {Asclepias syriaca} Philadelphia, USA

Philippe Clement / Seed pods of Common milkweed {Asclepias syriaca} Belgium

Michael & Patricia Fogden / Swallowtail (Papilio rhodostictus) visiting flowers of a Scarlet Milkweed (Aasclepias curassavica) rainforest ecosystem, Costa Rica