Birds in Spain Blog

Although scarce, albeit regular in both migration periods, there are very few records of White-winged Black Tern ( Chlidonias leucopterus ) in Spain during the winter months (December to February). The aim of this post is to collect them. The species, almost restricted to the Mediterranean seaboard (e.g. only 21 known records in Galicia, the latest for the autumn period on 31.10.1989, see Aves Raras en Galicia blog ) is a typical migrant. In the NE, it appears the last days of April and has a peak in the first ten days of May and it can be present until early June in scarcer numbers. Post-breeding migration begins during the summer, in late July and into August with further juveniles seen during September and sometimes October being the last records of the 2nd tenth of the month (Gutiérrez et al 1995 Els Ocells del Delta del Llobregat , Lynx Editions). Migration dates can be a bit modified depending on latitude in the country. However, there are a number of records in Spain in wint...