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House Martin - Delichon urbica

This page shows maps of 10km squares where this species was recorded during the first and second breeding atlases, the winter atlas and the change in distribution between the two breeding atlases. See the main pages for detailed descriptions of the Atlas survey and mapping methods.

Compare Breeding Atlas I and Atlas II side by side
House Martin coverage (number of squares recorded)
Channel Isles not included - see notes for details

Years Br present Ir present Br breeding Ir breeding Br total Ir total Both
1968-72 95 56 2330 839 2425.0 895.0 3320.0
1988-91 166 115 2227 695 2393.0 810.0 3203.0
Change % . . . . -1.3 -9.5 -3.5

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