Dave Bevan / Pair of Sand martins (Riparia riparia) feeding chicks, Carmarthenshire, Wales, UK, July.

Stephen Dalton / Earwig (Labidura riparia) on daisy flower. England, UK

David Kjaer / Sand martin (Riparia riparia) juvenile at entrance to nest burrow, Worcesrtershire, England, July

David Kjaer / Sand martin (Riparia riparia) adult and juveniles at entrance to nest burrows, Worcestershire, England, July

Stephen Dalton / Earwig {Labidura riparia} about to drop from yellow Iris flower, UK

Dave Bevan / Sand martin (Riparia riparia) flying to nest hole and feeding chick, Carmarthenshire, Wales, UK, June.

Dave Bevan / Slow motion clip of a Sand martin (Riparia riparia) feeding chick at entrance to nest hole, Carmarthenshire, Wales, UK, May.

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.

Dave Bevan / Pairs of Sand martins (Riparia riparia) at entrances to nest holes in bank of coal waste, Carmarthenshire, Wales, UK, April.

Dave Bevan / Flock of Sand martins (Riparia riparia) preening, perched on tree roots adjacent to nesting bank, Carmarthenshire, Wales, UK, April.

Dave Bevan / Slow motion clip of a Sand martin (Riparia riparia) digging nest hole in a bank of waste coal, Carmarthenshire, Wales, UK, April.

Dave Bevan / Slow motion clip of a pair of Sand martins (Riparia riparia) at nest hole, chasing away an intruder, Carmarthenshire, Wales, UK, April.

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.

Ralf Kistowski/ BIA / Sand Martin (Riparia riparia), North Rhine-Westphalia, Germany

Ralf Kistowski/ BIA / Sand Martin (Riparia riparia) at nest cavity, North Rhine-Westphalia, Germany

Ralph Martin/ BIA / Sand Martin (Riparia riparia) chicks in nest cavity, Baden-Wurttemberg, Germany

Hans Glader/ BIA / Sand Martin (Riparia riparia) at nest cavity, North Rhine-Westphalia, Germany

Phil Savoie / Sand Martin (Riparia riparia) in flight catching insects over the Madison River, Montana, USA. May.

Phil Savoie / Reflection of Sand Martin (Riparia riparia) hunting Speckled mayfly (Callibaetis sp.) Madison River, Montana, USA, May.

Phil Savoie / Sand martin (Riparia riparia) perched on wire, Madison, Montana, USA, June.

Phil Savoie / Sand martin (Riparia riparia) in flight, hunting insects above the Madison River, Montana, USA, June.

Loic Poidevin / Sand martin (Riparia riparia) feeding chicks on nest, Brittany, France, June

Loic Poidevin / Sand martin (Riparia riparia) feeding chicks on nest, Brittany, France, June

John Waters / Sand martin (Riparia riparia) about to grab swan feather on surface of River Wye to line its nest located nearby, Herefordshire, UK, May.

John Waters / Sand martin (Riparia riparia) taking swan feather from surface of River Wy to line its nest located nearby, Herefordshire, UK, May.

Pal Hermansen / Sand martins (Riparia riparia) chicks calling, begging for food, in nest, Norway, July.

Loic Poidevin / Sand martins (Riparia riparia) group of three on barbed wire, Vendee, France, July

Loic Poidevin / Sand martins (Riparia riparia) group of six on barbed wire, Vendee, France, July

Jussi Murtosaari / Sand martin (Riparia riparia), at the nest, North Karelia, Finland, June.

Neil Aldridge / Banded martin (Riparia cincta) resting on a reed stem, Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Banded martin (Riparia cincta) resting on a reed stem, Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Banded martin (Riparia cincta) resting on a reed stem, Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Banded martin (Riparia cincta) resting on a reed stem, Chobe River, Chobe National Park, Botswana.

Steven David Miller / Yellow garden orbweaver (Argiope aurantia) female in web with stabilimentum running vertically through web, Naples, Florida, USA. September.

Cyril Ruoso / Barn swallow (Hirundo rustica) and Sand martin (Riparia riparia) perched, France.

John Cancalosi / Golden orb weaver (Argiope aurantia) female on web, Virginia, USA, September.

David Tipling / Sand martin (Riparia riparia) at nest in sea cliff, North Norfolk, UK, June.

David Tipling / Sand martin (Riparia riparia) leaving nest in cliff, Salthouse, Norfolk, UK, June.

David Tipling / Sand martin (Riparia riparia) feeding young in nest hole at colony in sandstone cliffs, North Norfolk, UK, June.

David Tipling / Sand martin (Riparia riparia) leaving nest at colony in sea cliff, North Norfolk, UK, June.

MYN / Krista Schlyer / Black-and-yellow argiope (Argiope aurantia), Anacostia watershed, Washington DC metro region, USA, September. Meetyourneighbours.net project.

MYN / Krista Schlyer / Black-and-yellow argiope (Argiope aurantia), Anacostia watershed, Washington DC metro region, USA, September. Meetyourneighbours.net project.

Markus Varesvuo / Sand martin (Riparia riparia) flying over water, Norway, June

Markus Varesvuo / Sand martin (Riparia riparia) nest building in mud bank, Kuusamo, Finland, June

Markus Varesvuo / Sand martin (Riparia riparia) in flight carrying nesting material, Norway, June

Markus Varesvuo / Sand Martin (Riparia riparia) at nest entrance, Kuusamo, Finland, June

Markus Varesvuo / Sand martin (Riparia riparia) flying over water, Norway June

Markus Varesvuo / Sand Martin (Riparia riparia), Kuusamo, Finland, June

Markus Varesvuo / Sand martin (Riparia riparia) flying over water, Norway June

Markus Varesvuo / Sand Martin (Riparia riparia) at nest entrance, Kuusamo, Finland, June

Markus Varesvuo / Sand Martin (Riparia riparia) at nest entrance, Kuusamo, Finland, June

MYN / Gil Wizen / Raukumara tusked weta (Motuweta riparia) male. Found only along the banks of forested, slow-flowing streams. Males posses curved tusks on their mandibles, which are used for fighting. Little Manganuku...

Markus Varesvuo / Sand martin (Riparia riparia) in flight over water, Uto, Finland, July.

Rosl Roessner / Sand Martin (Riparia riparia) at entrance to cliff burrow, Rhineland-Palatinate, Germany

Rosl Roessner / Sand Martin (Riparia riparia) at burrow on cliff, Rhineland-Palatinate, Germany

David Pattyn / Sand martin (Riparia riparia) sitting on wires during migration. Greece. May

Cyril Ruoso / Variegated Greater Pond Sedge (Carex riparia) flowering, France

Juan Manuel Borrero / Illustration of Hirundinidae family: Common Sand Martin (Riparia riparia), Northen House-Martin (Delichon urbicum), Common Swift (Apus apus) and Barn Swallow (Hirundo rustica). Pencil and watercolor p...

Hanne & Jens Eriksen / Sand martin (Riparia riparia) in flight, Oman, September

Hanne & Jens Eriksen / Sand martin (Riparia riparia) in flight, Oman, September

Alan Williams / Sand Martin (Riparia riparia) one bird knocking other bird off cliff during rivalry for nesting place, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) right hand bird flying in to knock other bird off cliff during rivalry for nesting place, Wirral Merseyside UK June

Alan Williams / Sand martin (Riparia riparia) right hand bird knocking other bird off cliff during rivalry for nesting place, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) digging at cliff with it's beak to make nest hole, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) landing on cliff to make nest hole, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) landing on cliff to make nest hole, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) digging at cliff with it's beak to make nest hole, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) flying along cliff at nest site, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) singing while flying over cliff nest site, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) digging at cliff with it's beak to make nest hole, Wirral Merseyside UK June

Alan Williams / Sand Martin (Riparia riparia) singing perched on cliff at new nest hole, Wirral Merseyside UK June

Markus Varesvuo / Sand martin (Riparia riparia) in flight, Israel, May

Markus Varesvuo / Sand martin (Riparia riparia) in flight, Israel, May

Markus Varesvuo / Sand martins (Riparia riparia), Barn swallows (Hirundo rustica) and Yellow wagtails (Motacilla flava) collecting mud for nests on ground, Israel, May

Markus Varesvuo / Sand martin (Riparia riparia) nesting colony, Hungary, June

Markus Varesvuo / Sand martin (Riparia riparia) on wall, Hungary, June

Markus Varesvuo / Sand martin (Riparia riparia) chick at nest, calling, Hungary, June

Markus Varesvuo / Three Sand martins (Riparia riparia) two on twig, one in flight, Hungary, June

Markus Varesvuo / Sand martin (Riparia riparia) on twig preening, Hungary, June

Markus Varesvuo / Three Sand martins (Riparia riparia) at nest hole, Hungary, June

Markus Varesvuo / Sand martin (Riparia riparia) emerging from nest hole, Hungary, June

Markus Varesvuo / Two Sand martins (Riparia riparia) at nest hole, Hungary, June

Markus Varesvuo / Sand martin (Riparia riparia) on wall, Hungary, June

MYN / Niall Benvie / Common earwig (Labidura riparia), Scotland, UK, May meetyourneighbours.net project

Markus Varesvuo / Sand Martin (Riparia riparia) Hungary June

Markus Varesvuo / Sand Martin at nest (Riparia riparia) Hungary June

Markus Varesvuo / Sand martin (Riparia riparia) Israel May

Simon Colmer / Leaves of (Tetradenia riparia) a medicinal plant popular in East Africa. said to cure stomach ache, skin diseases and malaria. Anti-bacterial and anti-fungal.

Loic Poidevin / Sand Martins (Riparia riparia) gathering around their nesting hole in sand cliff. Norway, Europe, June.

Loic Poidevin / Sand Martins (Riparia riparia) at their nesting hole. Norway, June.

Robin Chittenden / Sand martins (Riparia rioaria) perched on wire fence, Cley NWT, Norfolk, UK, July

Robin Chittenden / Sand martin (Riparia rioaria) perched on wire, Cley NWT, Norfolk, UK, July

Robin Chittenden / Sand martin (Riparia rioaria) perching on wire, Cley NWT, Norfolk, UK, July

Nick Upton / Sand Martins (Riparia riparia), newly arrived in spring, flitting around and perched on sandy sea cliff where they will excavate nest burrows. Cornwall, UK, April.

Nick Upton / Sand Martins (Riparia riparia), newly arrived in spring, establishing nest sites on sandy cliff where they will excavate burrows. Cornwall, UK, April.

Nick Upton / Sand Martin (Riparia riparia) pair, newly arrived in spring, flitting around sandy sea cliffs looking for a potential nest site near another perched pair. Cornwall, UK, April.