Rob Tilley / Detail of plumage of Great White Egret / Heron (Ardea herodia occidentalis). Ding Darling Reserve, Florida, January.

George Sanker / American White Pelican (Pelecanus erythrorhynchos) group preening whilst Snowy Egret (Egretta thula) takes off, Ding Darling National Wildlife Refuge, Sanibel Island, Florida, USA.

George Sanker / Reddish Egret (Egretta rufescens) wading portrait, Ding Darling National Wildlife Refuge, Florida, USA.

George Sanker / Sandhill Crane (Grus canadensis) Ding Darling National Wildlife Refuge, Sanibel Island, Florida, USA.

Adrian Davies / The ventral side of a Horseshoe Crab (Limulus polyphemus) showing egg sacs. The crab has been scavenged by raccoons. Ding Darling Nature reserve, Florida, USA, January.

Adrian Davies / Snakebird / Darter / American Darter (Anhinga anhinga) drying its wings on branch. Ding Darling Nature Reserve, Sanibel Island, Florida, USA, January.

Adrian Davies / Snakebird / Darter / American Darter (Anhinga anhinga) preening itself on branch. Ding Darling Nature Reserve, Sanibel Island, Florida, USA, January.

Adrian Davies / The dorsal side of a Horseshoe Crab (Limulus polyphemus). The crab has been scavenged by raccoons. Ding Darling Nature reserve, Florida, USA, January.

Adrian Davies / White ibis (Eudocimus albus) standing at waters edge, Ding Darling Nature Reserve, Sanibel Island, Florida, USA

Rob Tilley / Park entrance sign for the J.N. Ding Darling National Wildlife Reserve, Salibel Island, Florida, USA, January 2009

Adrian Davies / Red-shouldered hawk (Buteo lineatus), perched in a tree, Ding Darling Nature Reserve, Sanibel Island, Florida, USA.

Adrian Davies / Recycling container for discarded fishing line. Ding Darling nature reserve, Sanibel Island, Florida, USA, 2008