Filippo Nucifora/ BIA / Little Ringed Plover (Charadrius dubius) male, Zurich, Switzerland

Filippo Nucifora/ BIA / Spotted Crake (Porzana porzana) foraging, Vorarlberg, Austria

Filippo Nucifora / Ruff (Philomachus pugnax) male in breeding plumage, Finland

Filippo Nucifora / Black Grouse (Tetrao tetrix) male, Saint Gallen, Switzerland

Filippo Nucifora / Coot (Fulica atra) taking flight from Lake Greifen, Switzerland

Filippo Nucifora / Rock Ptarmigan (Lagopus muta) male calling, Switzerland

Filippo Nucifora / Mallard (Anas platyrhynchos) drake calling, Switzerland

Filippo Nucifora / Common Eider (Somateria mollissima) duck, female, Switzerland

Filippo Nucifora / Broad-billed Sandpiper (Limicola falcinellus) juvenile wading, Austria

Filippo Nucifora / Broad-billed Sandpiper (Limicola falcinellus) juvenile wading, Austria

Filippo Nucifora / Baird's Sandpiper (Calidris bairdii) male, Alaska

Filippo Nucifora / Pectoral Sandpiper (Calidris melanotos) male calling, Alaska

Filippo Nucifora / Pectoral Sandpiper (Calidris melanotos) male, Alaska

Filippo Nucifora / Ruff (Philomachus pugnax) male displaying, Alaska

Filippo Nucifora / Northern Pintail (Anas acuta) drake, Alaska

Filippo Nucifora / Dunlin (Calidris alpina) male, Alaska

Filippo Nucifora / White-fronted Goose (Anser albifrons), Alaska

Filippo Nucifora / Sandhill Crane (Grus canadensis), Alaska

Filippo Nucifora / White-fronted Goose (Anser albifrons) flying, Alaska

Filippo Nucifora / American Golden-Plover (Pluvialis dominica) female calling, Alaska

Filippo Nucifora / Semipalmated Sandpiper (Calidris pusilla) male, Alaska

Filippo Nucifora / Long-billed Dowitcher (Limnodromus scolopaceus), Alaska

Filippo Nucifora / Greater Yellowlegs (Tringa melanoleuca) female calling, Alaska

Filippo Nucifora / King Eider (Somateria spectabilis) female, Alaska

Filippo Nucifora / Pectoral Sandpiper (Calidris melanotos) male fluffing feathers for warmth, Alaska

Filippo Nucifora / Semipalmated Sandpiper (Calidris pusilla) male, Alaska

Filippo Nucifora / Western Sandpiper (Calidris mauri), Alaska

Filippo Nucifora / Red-necked Grebe (Podiceps grisegena), Alaska

Filippo Nucifora / Spectacled Eider (Somateria fischeri) drake, Alaska

Filippo Nucifora / Rock Sandpiper (Calidris ptilocnemis), Alaska

Filippo Nucifora / Baird's Sandpiper (Calidris bairdii) male, Alaska

Filippo Nucifora / Dunlin (Calidris alpina) displaying, Alaska

Filippo Nucifora / Lapland Bunting (Calcarius lapponicus) female, Alaska

Filippo Nucifora / Spectacled Eider (Somateria fischeri) drake, Alaska

Filippo Nucifora / Tree Swallow (Tachycineta bicolor), Alaska

Filippo Nucifora / Red-throated Loon (Gavia stellata) in breeding plumage, Alaska

Filippo Nucifora / Ruff (Philomachus pugnax) male in breeding plumage, Alaska

Filippo Nucifora / Semipalmated Plover (Charadrius semipalmatus) running over sand, Alaska

Filippo Nucifora / Pacific Loon (Gavia pacifica), Alaska

Filippo Nucifora / Great Crested Grebe (Podiceps cristatus) swallowing fish, Switzerland

Filippo Nucifora / Great Crested Grebe (Podiceps cristatus) with fish prey, Switzerland

Filippo Nucifora / Black-winged Stilt (Himantopus himantopus) wading, Switzerland

Filippo Nucifora / Common Sandpiper (Actitis hypoleucos), Switzerland

Filippo Nucifora / Eurasian Penduline-Tit (Remiz pendulinus) male, Switzerland

Filippo Nucifora / Great Tit (Parus major), Switzerland

Filippo Nucifora / Bluethroat (Luscinia svecica) male, Switzerland

Filippo Nucifora / Bohemian Waxwing (Bombycilla garrulus), Switzerland

Filippo Nucifora / Lesser Spotted Woodpecker (Dendrocopos minor) at nest cavity, Switzerland