Prevent Housemartins Nesting in Your Eaves | No More Birds
Swan's snippets: Artificial nests for house-martins - The Field
House martins in dire decline because 'homeowners are destroying their nests' | Daily Mail Online
Delichon - Wikipedia
House Martin - BirdWatch Ireland
14 facts about house martins – The Devon House Martin Project
Species of the day: House Martin | Sussex Wildlife Trust
Help protect House Martin nests - BirdGuides
Extreme weather threatens existence of house martins in Britain | Birds | The Guardian
Almost Wordless Wednesday: House Martins | The Anxious Gardener
House martin: song, nest & migration - Plantura
Almost Wordless Wednesday: House Martins | The Anxious Gardener
House martins: July bird of the month - The English Garden
Cooperative defence of colonial breeding house martins (Delichon urbicum) against nest-usurping house sparrows (Passer domesticus)
File:House Martin nests (35255196250).jpg - Wikimedia Commons
Did you know a house martin's nest is made with 1,000 beak-sized pellets of mud? | Scottish Wildlife Trust
House Martin Bird Nest at Trelissick Gardens - Housemartins - YouTube
House Martins/swallows - No Birds Here!
Swallows and House Martins Desperately Need Our Help - Valencia Birding - Guided Bird Watching in Spain
House Martin | BTO - British Trust for Ornithology
House Martins – David at the HALL of EINAR
Northern/Siberian House-Martin - eBird
House Martin (Delichon urbicum) - Woodland Trust
