Doug Wechsler / Horseshoe crab (Limulus polyphemus) embryos, Delaware Bay, New Jersey, USA, June.

Steve Nicholls / Horseshoe crabs (Limulus polyphemus) spawning at low tide, Slaughter Beach, Delaware, USA, May

Ingo Arndt / Delaware Bay at full moon, Delaware, USA, May 2008

Ingo Arndt / Rear view of Horseshoe crab (Limulus polyphemus) with trail in sand, Delaware Bay, Delaware, USA, May

Mark Brownlow / Aerial view of Snow goose (Chen caerulescens) flock in flight, part of annual migration, Bombay Hook NWR, Delaware Bay, Delaware, USA. November 2005, BBC Planet Earth

Mark Brownlow / Aerial view of Bombay Hook NWR, Delaware Bay, Delaware, USA. Salt marsh and refuge for migratory flocks of Greater snow geese. November 2005, BBC Planet Earth

Mark Brownlow / Aerial view of Bombay Hook NWR, Delaware Bay, Delaware, USA. Salt marsh and refuge for migratory flocks of Greater snow geese. November 2005, BBC Planet Earth

Mark Brownlow / Aerial view of Bombay Hook NWR, Delaware Bay, Delaware, USA. Salt marsh and refuge for migratory flocks of Greater snow geese. November 2005, BBC Planet Earth

Doug Wechsler / Spotted salamander eggs {Ambystoma maculatum} with symbiotic algae, Delaware, USA

Doug Wechsler / Eastern mud turtle in seasonal pond {Kinosternon subrubrum} Blackbird St Forest, Delaware, USA

Doug Wechsler / Marsh samphire (Salicornia europaea) on salt marsh. Delaware NJ USA

Doug Wechsler / Pine Barrens Treefrog singing, Delaware, Blackbird State Forest, USA

Doug Wechsler / Barking treefrog (Hyla gratiosa) male singing. Blackbird State Forest, Delaware, USA

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) group crawling ashore on the high tides of spring to lay their eggs in Delaware Bay's sandy beaches, New Jersey

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) group crawling ashore on the high tides of spring to lay their eggs in Delaware Bay's sandy beaches, New Jersey

Doug Wechsler / Willet (Catoptrophorus semipalmatus) feeding on horseshoe crab eggs, Delaware Bay, New Jersey, USA. May.

Doug Wechsler / Boat-tailed grackle (Quiscalus major) foraging on horseshoe crab eggs, Delaware Bay, New Jersey, USA, May.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) female laying eggs, Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin)female coming to beach to nest, Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) female coming to beach to nest, Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) female coming to beach to nest, Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) female coming to beach to nest, Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) female, Delaware Bay, New Jersey, USA, June.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) swimming, Delaware Bay, New Jersey, USA, June.

Doug Wechsler / Diamondback terrapin (Malaclemys terrapin) portrait, Delaware Bay, New Jersey, USA, June.

Doug Wechsler / Mixed shorebird flock resting during migration, Delaware Bay, New Jersey, May.

Doug Wechsler / Stranded horseshoe crabs (Limulus polyphemus) at sunset; Delaware Bay, New Jersey, USA, June.

Doug Wechsler / Horseshoe crab (Limulus polyphemus) at sunset; Delaware Bay, New Jersey, USA, June.

Phil Savoie / Blue ribbon trout stream, a branch of the Delaware River, New York, USA, May.

Phil Savoie / Blue ribbon trout stream, a branch of the Delaware River, New York, USA, May.

Doug Wechsler / Barking treefrog (Hyla gratiosa) pair in amplexus, Blackbird State Forest, Delaware, USA, May.

Doug Wechsler / Barking treefrog (Hyla gratiosa) calling, Blackbird State Forest, Delaware, USA, May.

Doug Wechsler / Barking treefrog (Hyla gratiosa) Blackbird State Forest, Delaware, USA, May.

Doug Wechsler / Barking treefrog (Hyla gratiosa) calling, vocal sac inflated, Blackbird State Forest, Delaware, USA, May.

Doug Wechsler / Barking treefrog (Hyla gratiosa) Blackbird State Forest, Delaware, USA, May.

Doug Wechsler / Approaching storm over Moore's Beach, Delaware Bay, New Jersey, USA, June.

Doug Wechsler / Acrobat ant (Crematogaster sp) larvae and pupae, St. Jones Reserve, Delaware, USA, June.

Doug Wechsler / Acrobat ant (Crematogaster) larvae and pupae, St. Jones Reserve, Delaware, USA, June.

Doug Wechsler / Red knots (Calidris canutus) Ruddy turnstones (Arenaria interpres) and Semipalmated sandpipers (Calidris pusilla) Franklin's gull (Leucophaeus pipixcan) and juvenile Herring gulls (LEucophaeus atricil...

Doug Wechsler / Seaside dragonlet (Erythrodiplax berenice) Delaware Bay, New Jersey, USA, July.

Doug Wechsler / Ruddy turnstone (Arenaria interpres) eating horseshoe crab on beach, with Semipalmated sandpipers (Calidris pusilla) in background, Delaware Bay, New Jersey, May.

Doug Wechsler / Ruddy turnstone (Arenaria interpres) feeding on dead horseshoe crab on beach, with Semipalmated sandpipers (Calidris pusilla) in background, Delaware Bay, New Jersey, May.

Doug Wechsler / Robber fly (Efferia albibarbis) on white background, St. Jones Reserve, Delaware, USA, June.

Doug Wechsler / Robber fly (Efferia albibarbis) on white background, St. Jones Reserve, Delaware, USA, June.

Doug Wechsler / Horseshoe crabs (Limulus polyphemus) on beach mating, with Ruddy turnstone (Arenaria interpres) and Red knot (Calidris canuta) on beach, Delaware Bay, New Jersey, May.

Doug Wechsler / Red knots (Calidris canuta) and Ruddy turnstone (Arenaria interpres) feeding on Horseshoe crab (Limulus polyphemus) eggs, Delaware Bay, New Jersey, USA, May.

Doug Wechsler / Dunlin (Calidris alpina), Semipalmated sandpipers (Calidris pusilla) and Short-billed dowitcher (Limnodromus griseus) feeding on horseshoe crab eggs, Delaware Bay, New Jersey, USA, May.

Doug Wechsler / Dunlin (Calidris alpina), Semipalmated sandpipers (Calidris pusilla) and Short-billed dowitcher (Limnodromus griseus) feeding on horseshoe crab eggs, Delaware Bay, New Jersey, USA, May.