Sandesh Kadur / Huge flock of Amur falcons (Falco amurensis) congregating at a roosting site during their migration from Siberia to Africa, Doyang Reservoir, Nagaland, India, October.
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Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.
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Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.
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Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.
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Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.
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Sandesh Kadur / Slow motion clip of Amur falcons (Falco amurensis) congregating at roost site during their migration from Siberia to Africa, near Doyang reservoir, Nagaland, India, October.
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David Perpinan / Peach-fronted parakeets (Aratinga aurea) at roosting site, Pantanal, Mato Grosso do Sul, Brazil.
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David Perpinan / Peach-fronted parakeets (Aratinga aurea) at roost site, Pantanal, Mato Grosso do Sul, Brazil.
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David Perpinan / Peach-fronted parakeets (Aratinga aurea) at roost site, Pantanal, Mato Grosso do Sul, Brazil.
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Matthew Maran / Dead oak tree (Quercus robur) casualty of prolonged flooding in the Otter Valley. Now provides a valuable nesting site for roosting bats and nesting birds, East Devon, England, UK, November.
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Benjam Pontinen / Flock of Eurasian cranes (Grus grus ) flying at dusk before roosting, High Coast / Kvarken Archipelago UNESCO Natural World Heritage Site, Finland, September 2016
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Benjam Pontinen / Eurasian cranes (Grus grus ) flying at dusk before roosting, High Coast / Kvarken Archipelago UNESCO Natural World Heritage Site, Finland, September