You could read in May several times in the media that there were fewer Common Swifts (Apus apus) and Northern House-Martins (Delichon urbica) this year than in previous years. For example, a conservation organization reported on the results of the “Stunde der Gartenvogel”, which is equivalent the RSPB Big Garden Birdwatch number of these fast-flying insectivores declined by 40% less compared to 2006, when the first garden birds count (Stunde der Gartenvogel) was heralded.
But is it possible to deduce the extent of the loss of insect-eating birds from a momentary impression?
Meanwhile, both species are already longer in the country and the breeding season is almost over. Thus, the number of Common Swift has already passed its zenith again and since the beginning of August, no adult or this year’s specimens are present at some colonies in Brandenburg. House-Martins will be still present for several weeks but have bred already as well.
Thus, there are now good preconditions for answering the question Continue reading Common Swift and Northern House-Martin: a bad year in Germany?