David Tipling / Atlantic Puffin {Fratercula arctica} with Sandeels in beak, Scotland, UK.
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Dave Bevan / Dipper (Cinclus cinclus) perching on a boulder with beakful of nesting material, Ceredigion, Wales, UK, April.
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Mike Read / Imperial shag (Phalacrocorax atriceps albiventer) adult on rocks with a beakful of nesting material, Sealion Island, Falkland Islands. December.
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Marie Read / Red-headed woodpecker (Melanerpes erythrocephalus) flying to nest hole with beakful of insects for young in nest, Montezuma Wildlife Refuge, New York, USA, August
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Brent Stephenson / Atlantic puffin (Fratercula arctica) flying towards burrow with beakful of sandeels (Ammodytidae) Vigur Island, Isafjardardjup, Iceland. July.
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Brent Stephenson / Atlantic puffin (Fratercula arctica) standing on a rock on the edge of the nesting cliff, with a beakful of sandeels (Ammodytidae). Flannan Isles, Outer Hebrides, Scotland. July.
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Brent Stephenson / An Atlantic puffin (Fratercula arctica) runs with wings outstretched carrying a beakful of nesting material which it will use to line its nest, Fair Isle, Shetland Islands, United Kingdom. June.
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Brent Stephenson / St Kilda wren (Troglodytes troglodytes) with a beakful of food standing on the top of a stone wall near its nest. Mousa, Shetland Islands, United Kingdom. June.
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Nick Upton / Marsh tit (Poecile palustris) with beakful of green caterpillars, Wiltshire hedgerow, UK, June.
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Nick Upton / Marsh tit (Poecile palustris) with beakful of green caterpillars, Wiltshire hedgerow, UK, June.
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Nick Upton / Marsh tit (Poecile palustris) with beakful of green caterpillars, Wiltshire hedgerow, UK, June.
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Marie Read / Red-breasted Sapsucker (Sphyrapicus ruber), outside entrance to nest cavity in treetrunk, holding beakful of insects for young. Lee Vining Canyon, Mono Lake Basin, California, USA, June.
