Jack Dykinga / Flocks of Mallard ducks (Anas platyrhynchos) taking off in tree-lined wetlands. Bosque del Apache National Wildlife Refuge, New Mexico, USA.
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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 / Loggerhead shrike (Lanius ludovicianus) on an ice-covered fence after an ice storm, Anahuac National Wildlife Refuge, Texas, USA. January.
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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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Sylvain Cordier / Polar bear (Ursus maritimus), female with two cubs, on a barrier island outside Kaktovik, Alaska, USA.
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Jack Dykinga / Sandhill cranes (Grus canadensis) flying in to land at sunset in golden light, Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.
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Jack Dykinga / Sandhill cranes (Grus canadensis) landing at sunset, blurred motion, Bosque del Apache National Wildlife Refuge, New Mexico, USA.
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Jack Dykinga / Milky Way over Kofa Queen Canyon, Kofa Mountains, Kofa National Wildlife Refuge, Arizona, USA. September 2017.
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Jack Dykinga / Milky Way over Kofa Queen Canyon, Kofa Mountains, Kofa National Wildlife Refuge, Arizona, USA. September 2017.
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Ingo Arndt / Large flock of Snow Geese (Chen caerulescens) flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA
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Jack Dykinga / Sandhill cranes (Grus canadensis) mating dance at sunset, Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.
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Jack Dykinga / Snow geese (Chen caerulescens) in flight in front of super moon, Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.