Ripan Biswas / Two Asian weaver ants (Oecophylla smaragdina) engaged in trophallaxis, social feeding, West Bengal, India.
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Rose Summers / Three Common kestrel (Falco tinnunculus) chicks sitting at entrance of nest in tree trunk, male arrives with food and feeds chick before flying away, Devon, England, UK, June.
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David Perpinan / Barn swallow (Hirundo rustica) fledgling perched on a cable recieves food from its parent, Cuenca, Spain, July.
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David Perpinan / Two Barn swallow (Hirundo rustica) fledglings perched on a cable, parent flies in and gives one chick food, Cuenca, Spain, August.
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David Perpinan / Two Barn swallow (Hirundo rustica) fledglings perched on a cable, parent flies in and gives one chick food, Cuenca, Spain, August.
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David Perpinan / Two Barn swallow (Hirundo rustica) fledglings perched on a cable, parent flies in and feeds one chick while the other chick stretches its wings, Cuenca, Spain, August.
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David Perpinan / Barn swallow (Hirundo rustica) fledglings perched on a cable, parent flies in and feeds one chick, Cuenca, Spain, August.
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David Perpinan / Barn swallow (Hirundo rustica) feeding chick, Barcelona, Spain, June.
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David Perpinan / Barn swallow (Hirundo rustica) visiting nest to feed chicks, Barcelona, Spain, July.
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David Perpinan / Tree sparrow (Passer montanus) visiting nest to feed chicks, Barcelona, Spain, July.
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David Perpinan / Tree sparrow (Passer montanus) visiting nest to feed chicks, Barcelona, Spain, July.
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David Perpinan / Pair of European bee-eater (Merops apiaster) sharing prey, Cuenca, Spain, June.
