Mark Hamblin / 2020VISION / Male House sparrow (Passer domesticus) perched on gutter, Pembrokeshire Coast National Park, Wales, UK, May.

Mark Hamblin / 2020VISION / Barn swallow (Hirundo rustica) perched on gutter, Pembrokeshire Coast National Park, Wales, UK, May.

Mark Hamblin / 2020VISION / Male House sparrow (Passer domesticus) perched on edge of a gutter, Pembrokeshire Coast National Park, Wales, UK, May.

Laurent Geslin / Wood pigeons (Columba palumbus) nesting in a stone gutter. Paris, France

Laurent Geslin / Wood pigeons (Columba palumbus) nesting in a stone gutter in Paris, France

David Woodfall / Water flowing into gutter during rainstorm. Denbigh, North Wales, UK. July 2009.

Fabio Liverani / Bones used to hold up gutter, Matera, Basilicata, Southern Italy

Dave Bevan / Pied wagtail (Motacilla alba yarrellii) perched on roof gutter with insect prey, UK

Michael Hutchinson / Italian Alder (Alnus cordata) catkins and cones with moss in concrete pavement gutter, Bristol, UK

David Kjaer / Male House Sparrow (Passer domesticus) perched on house roof gutter, Gloucestershire UK

Colin Monteath / Hiker above the gutter, from headland above Mason Bay, Rakiura National Park, Stewart Island, New Zealand

Heidi & Hans-Juergen Koch / Domestic Cat (Felis catus) sitting on a rain gutter, overlooking the garden, The Hemingway House, Key West, Florida

Mike Wilkes / Male common (house) sparrow perched on gutter, Worcestershire, England

Chris Gomersall / Common starling returns to nest in roof {Sturnus vulgaris} UK

Duncan Usher / Black Rat (Rattus rattus) adult in a rain gutter, Europe

Mike Read / Black redstart juvenile on roof {Phoenicurus ochruros} France