Transparent utfyllnad House MartinDelichon urbicum
A nice bird at Achadas da Cruz on 2nd May 2008. An incredible number of 3000 birds was counted between Achadas da Cruz and Porto Moniz (including a flock of approximately 1000 birds) on that day! Photo: Sampsa Cairenius, Finland. House Martins at Lugar de Baixo in April 2008.
Photo: Thijs Valkenburg, Netherlands.

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