George McCarthy / RF- Tawny owl with moon behind (Strix aluco), UK. (This image may be licensed either as rights managed or royalty free.)
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Ismaele Tortella / Three Rock ptarmigan (Lagopus muta) feeding in winter plumage, city of Tromso in the background, northern Norway, March 2019.
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John Shaw / Snowy egret (Egretta thula) shows its breeding plumage. St. Johns Management Area, Florida, USA, March.
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Marie Read / Horned Puffin (Fratercula corniculata) flying over a pattern of kelp and sea foam, photographed from above, St. Paul, Pribilof Islands, Alaska, USA. July.
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Marie Read / Roseate spoonbill (Ajaia ajaja) adult in breeding plumage preening tail feathers, Black Point Wildlife Drive, Merritt Island National Wildlife Refuge, Florida, USA, January.
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Marie Read / Ruby-throated Hummingbird (Archilocus colubris), male flying in to feed from cardinal flowers (Lobelia cardinalis) New York, USA. August.
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Marie Read / American avocet (Recurvirostra americana), adult in breeding plumage foraging by sweeping its bill from side to side through shallow water, Orange County, California, USA, April.
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Marie Read / Black skimmers (Rynchops niger), three in non-breeding plumage on beach, Fort De Soto Park, St. Petersburg, Florida, USA. January. Digitally altered to remove distractions.
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Marie Read / Great blue heron (Ardea herodias) in breeding plumage, head and shoulders showing plumes on crown and neck, Montezuma National Wildlife Refuge, New York, USA, May.
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Marie Read / Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May.
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Philippe Clement / Two Atlantic puffins (Fratercula arctica) in breeding plumage on cliff top, Sumburgh Head, Shetland Islands, Scotland, UK, June.
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Chris Gomersall / Large flock of Red knot (Calidris canutus) moving at high tide roost, in winter plumage, Snettisham RSPB Reserve, Norfolk, England, UK, September.