Michael Durham / Monarch butterfly {Danaus plexippus} adult emering from chrysalis casing. Sequence 6 of 11

Michael Durham / Monarch butterfly {Danaus plexippus} adult emerging from chrysalis casing. Sequence 7 of 11

Michael Durham / Monarch butterfly {Danaus plexippus} adult emerging from chrysalis casing. Sequence 8 of 11

Michael Durham / Monarch butterfly {Danaus plexippus} adult emerging from chrysalis casing. Sequence 9 of 11

Michael Durham / Monarch butterfly {Danaus plexippus} adult emerging from chrysalis casing. Sequence 10 of 11

Michael Durham / Monarch butterfly {Danaus Plexippus} fully emerged from chrysalis casing. Sequence 11 of 11.

David Welling / Mass of Monarch butterflies (Danaus plexippus). USA

Larry Michael / Monarch Butterfly on golden rod flowers

Doug Wechsler / Monarch butterfly with tagged wing - migration study (Danaus plexippus) New Jersey USA

Doug Wechsler / Monarch butterfly (Danaus plexippus) at flower, USA

Tom Vezo / Monarch butterflies (Danaus plexippus) on flowers. Ontario, USA

Tom Vezo / Monarch butterfly. Point Pelee, Ontario, Canada

TOM MANGELSEN / Monarch butterflies massed on tree trunk at overwintering site, Mexico

TOM MANGELSEN / Monarch butterflies on water (Danaus plexippus) Mexico

TOM MANGELSEN / Monarch butterflies (Danaus plexippus). Mexico, Central America

Albert Aanensen / Monarch butterfly (Danaus plexippus) feeding. New Zealand

Albert Aanensen / Monarch butterfly (Danaus plexippus) feeding. New Zealand

Nigel Marven / Monarch butterflies on migration, Mexico

Phil Savoie / Smaller Viceroy butterfly mimics larger poisonous Monarch butterfly for defence

Tom Vezo / Monarch butterflies {Danaus plexippus} New York USA

Lynn M Stone / Monarch butterfly on sawtooth sunflower, USA.

Doug Wechsler / Monarch butterfly tagged for research, to track migration. NJ, USA

Doug Wechsler / Monarch butterfly pupa (Danaus plexippus) US

TOM MANGELSEN / Forest where masses of Monarch butterflies roost in trees (Danaus plexippus) Mexico

TOM MANGELSEN / Monarch butterflies and tourist (Danaus plexippus) Mexico

TOM MANGELSEN / Monarch butterflies massed on tree trunk (Danaus plexippus) Mexico

TOM MANGELSEN / Child with Monarch butterflies (Danaus plexippus) Mexico

Robin Chittenden / Person measuring Monarch butterfly (Danaus plexippus) wing, New Jersey, USA, September

Robin Chittenden / Monarch butterfly (Danaus plexippus) on flower with tag on wing, New Jersey, USA, September

Tom Vezo / Monarch butterfly (Danaus plexippus) on yellow flowers, Long Island, New York, USA

LYNN M. STONE / Monarch butterfly {Danaus plexippus} resting on Rough blazing star, Illinois, USA

Tom Vezo / Monarch butterfly {Danaus plexippus} on yellow flower, Canada Point, Ontario, Canada

Steven David Miller / Monarch butterflies {Danaus plexippus} on leaf, Australia

TOM MANGELSEN / Monarch butterflies flying (Danaus plexippus) Mexico