Yumiko Wakisaka / Sowerby's Beaked Whale (Mesoplodon bidens)

Doug Wechsler / Ants milking Aphids (Aphis corepsidis) and Ladybug larva (Scymninae) on Beggar-ticks (Bidens frondosa) Lardner's Point Park, Philadelphia, Pennsylvania, USA, August.

Doug Wechsler / Showy bur marigold (Bidens laevis) in the riparian zone of the Manumuskin River, New Jersey, USA, September

Toby Roxburgh / Scientists from the Welsh Marine Environmental Monitoring team and ranger from Kenfig Nature Reserve looking at the carcass of Sowerby's Beaked Whale (Mesoplodon bidens), washed up on the coast near P...

Toby Roxburgh / Scientist from the Welsh Marine Environmental Monitoring team dissecting the carcass of Sowerby's Beaked Whale (Mesoplodon bidens) washed up on beach near Porthcawl to try to determine the cause of de...

Toby Roxburgh / Scientists from the Welsh Marine Environmental Monitoring team photographing the carcass of Sowerby's Beaked Whale (Mesoplodon bidens) washed up on beach near Porthcawl to try to determine the cause o...

Toby Roxburgh / Scientist from the Welsh Marine Environmental Monitoring team dissecting the carcass of a Sowerby's Beaked Whale (Mesoplodon bidens) washed up on a beach in order to try to help determine the cause of...

Toby Roxburgh / Scientists from the Welsh Marine Environmental Monitoring team dissecting the carcass of a Sowerby's Beaked Whale (Mesoplodon bidens) washed up on a beach in order to try to help determine the cause o...

Toby Roxburgh / Scientist from the Welsh Marine Environmental Monitoring team and ranger from Kenfig Nature Reserve looking at the carcass of a Sowerby's Beaked Whale (Mesoplodon bidens), washed up on the coast near...

Juan Manuel Borrero / Two-Toothed Brassia orchid (Brassia bidens) close up in flower, Bosque de Protección Alto Mayo. Amazonas Department. Peru

Dietmar Nill / Shieldbug (Picromerus bidens) catching caterpillar prey amongst red currant berries, Germany

Mark Bowler / Red clawed / claw crab {Perisesarma bidens} front and rear view