Images Dated 11th March 2004

NA, USA, Alaska, Denali NP Willow ptarmigan (Lagopus lagopus) A female stands

NA, USA, Alaska, Denali NP Willow ptarmigan (Lagopus lagopus) A female stands among arctic poppies and moss campion

© Hugh S. Rose / Danita Delimont, Agent

Alaska, Animal, Arctic Poppy, Beak, Bill, Bird, Campion, Danita Delimont, Denali, Denali National Park, Depth Of Field, Environment, Eye, Feather, Female, Flora, Flower, Habitat, Hugh Rose, Moss Campion, Nature, North America, Portrait, Profile, Rf, Season, Usa, Wildflower, Wildlife, Willow Ptarmigan, Wing

N.A., USA, Alaska, Iditarod Trail Doug Swinly races his dog sled in the 1994 Iditarod

N.A., USA, Alaska, Iditarod Trail Doug Swinly races his dog sled in the 1994 Iditarod sled race (Editorial Usage Only)

© Paul Souders / Danita Delimont, Agent

Alaska, Animal, Compete, Danita Delimont, Dog, Dog Sled, Event, Husky, Iditarod, Iditarod Trail, North America, Paul Souders, Race, Rf, Run, Season, Sled, Snow, Sport, Team, Tradition, Trail, Usa, Winter

Protozoan, SEM

Protozoan. Scanning electron micrograph (SEM) of the dinoflagellate, Dinophysis sp. Dinoflagellates are unicellular protozoans and about 90% are found in marine environments as plankton. They are characterised by a complex covering called an amphiesma, which is made of a continuous outer and inner membrane. The amphiesma can be perforated. Another major characteristic is the presence of two flagella. One flagellum beats back and forth, while the other is flat and ribbon-like, and works as a rudder to steer and rotate. Dinophysis sp. produces lipophilic toxins, which can accumulate in shellfish and cause diarrhetic shellfish poisoning (DSP) in humans. Magnification unknown

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY