Man wearing Vlcnov folk dress during Ride of the Kings festival calling out verses supporting king, Vlcnov, Zlinsko, Czech Republic, Europe

Northern elephant seal (mirounga angustirostris) female calling, tongue out, san benitos island, baja, mexico

A mother and newborn pup leopard seal (Hydrurga leptonyx) hauled out on ice floes on the western side of the Antarctic peninsula

Eider duck (Somateria mollissima), male. Eider male peering out from in the middle of a winter raft. Various preening, calling and fighting in background.

A mother and newborn pup leopard seal (Hydrurga leptonyx) hauled out on ice floes on the western side of the Antarctic peninsula

A mother and newborn pup leopard seal (Hydrurga leptonyx) hauled out on ice floes on the western side of the Antarctic peninsula, Southern Ocean

Adult gentoo penguin (Pygoscelis papua) calling out in the Aitcho Island Group, South Shetland Islands, Antarctica.

Snowy Owls (Nyctea scandiaca), two fledglings callingtdoors, outside, ornithology, zoology, color, colour

Toco Toucan (Ramphastos toco), adult, on tree, Pantanal, Brazil, South America

Northern White-cheeked Gibbon (Hylobates leucogenys), female adult calling in tree, Asia

Snowy Owls (Nyctea scandiaca), three fledglings calling

Snowy Owl, Arctic Owl, Great White Owl, Harfang (Bubo scandiacus) (Nyctea scandiaca), calling

Siamang (Symphalangus syndactylus, Hylobates syndactylus), calling female with young, native of Asia, in captivity, Czech Republic, Europe

Cougar or Puma (Puma concolor, Felis concolor), adult, with mouth open, snow, Montana, USA

Bald eagle (Haliaeetus leucocephalus), immature, calling, found in North America, captive, Germany, Europe

Siamang (Symphalangus syndactylus, Hylobates syndactylus), male calling, native of Asia, in captivity, Czech Republic, Europe

Great Gray Owl (Strix nebulosa), adult, portrait, calling, Germany, Europe

Snowy Owls (Nyctea scandiaca), three fledglings calling

Carnival, Rose Monday parade in Koblenz, Rhineland-Palatinate, Germany, Europe

A deer on a hillside calling out while rutting season with a backdrop of distant mountains, Red deer (Cervus elaphus), Wildpark Aurach, Austria, Europe

Young European Starlings (Sturnus vulgaris)

Young Snowy Owl (Bubo scandiacus, Nyctea scandiaca)

Eagle Owl (Bubo bubo), adult, perched on a look-out, calling, Germany, Europe

Great Grey Owl or Lapland Owl (Strix nebulosa), adult, portrait, calling, Germany, Europe

Crowds of people breaking through the Berlin Wall, painting, mural, Berlin Wall, East Side Gallery, Berlin, Germany, Europe

Young man with damaged car calling the mechanic, Frustrated man with damaged car calling technician on the road. Driver with the damaged car calling the mechanic

Carnival, Rose Monday parade in Koblenz, Rhineland-Palatinate, Germany, Europe

Carnival, Rose Monday parade in Koblenz, Rhineland-Palatinate, Germany, Europe

Eagle Owl (Bubo bubo), adult, perched on a look-out, calling, Germany, Europe

Art Nouveau building in the Wienzeile street, Vienna, Austria, Europe

Eagle Owl (Bubo bubo) in flight

Bald Eagle (Haliaeetus leucocephalus), juvenile

Sandhill crane (Grus canadensis) migrating north in late April to nesting grounds in Alaska, cries out from a farmer's field in Palmer, Alaska. Located in the Matanuska Valley, Palmer was founded as an agricultural colony in the mid-20th century, Palmer, Alaska, United States of America

California Sea Lions (Zalophus Californianus) Haul Out In The Harbour, Astoria, Oregon, United States Of America

Bald eagle (Haliaeetus leucocephalus) calling out while perched in a tree against a blue sky, Alaska, United States of America