David Woodfall / Lesser horseshoe bats (Rhinolophus hipposideros) in magnesium mine, Shropshire, England, UK, April.
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Jack Dykinga / Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.
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Jack Dykinga / Murmuration of Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) at sunset, before roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.
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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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Bernard Castelein / Indian Flying Fox (Pteropus giganticus) male roosting in tree, Keoladeo NP, Bharatpur, India
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Robert Valentic / Short-nosed fruit-bat (Cynopterus brachyotis) roosting, Ko Chang Island, Thailand.
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John Waters / Large group of Pied wagtails (Motacilla alba) roosting in a Plane tree (Platanus hispanica), Bath, England, UK, January.
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John Waters / Large murmuration of Common starlings (Sturnus vulgaris) swirling over reedbed roost at sunset, Ham Wall RSPB Reserve, Somerset, England, UK, January.
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John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.
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John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.
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Phil Savoie / White tent making bat (Ectophylla alba) roosting in Heleconia leaf, La Selva Field Station, Costa Rica.
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David Tipling / Eurasian magpies (Pica pica) five gathering prior to going to roost Hortobagy National Park, Hungary January
