Dave Bevan / Pair of Sand martins (Riparia riparia) feeding chicks, Carmarthenshire, Wales, UK, July.
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Robin Chittenden / House martin (Delichon urbicum) group on ground, collecting sand for nests. Cyprus. April.
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Robin Chittenden / House martin (Delichon urbicum) on ground, collecting sand for nest. Cyprus. April.
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Dave Bevan / Sand martin (Riparia riparia) flying to nest hole and feeding chick, Carmarthenshire, Wales, UK, June.
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Dave Bevan / Slow motion clip of a Sand martin (Riparia riparia) feeding chick at entrance to nest hole, Carmarthenshire, Wales, UK, May.
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Dave Bevan / Pair of Sand martins (Riparia riparia) at nest hole in bank of coal waste, with another trying to land at the same hole, Carmarthenshire, Wales, UK, April.
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Dave Bevan / Pairs of Sand martins (Riparia riparia) at entrances to nest holes in bank of coal waste, Carmarthenshire, Wales, UK, April.
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Dave Bevan / Flock of Sand martins (Riparia riparia) preening, perched on tree roots adjacent to nesting bank, Carmarthenshire, Wales, UK, April.
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Dave Bevan / Slow motion clip of a Sand martin (Riparia riparia) digging nest hole in a bank of waste coal, Carmarthenshire, Wales, UK, April.
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Dave Bevan / Slow motion clip of a pair of Sand martins (Riparia riparia) at nest hole, chasing away an intruder, Carmarthenshire, Wales, UK, April.
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Dave Bevan / Slow motion clip of a Sand martin (Riparia riparia) flying to nest hole and starting to dig before mate arrives to protect entrance, Carmarthenshire, Wales, UK, April.
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Phil Savoie / Sand Martin (Riparia riparia) in flight catching insects over the Madison River, Montana, USA. May.