Seawatching, march – may 1989

From Scheveningen (Sch), mainland coast of Zuid-Holland, 20 hours of seawatching were carried out. In Noord-Holland results of over 150 hours were received, mainly from the Hondsbossche Zeewering (Hbz) and Egmond aan Zee (Egm). A few days were ’covered’ on sites on Ameland and the Frisian coast. Northbound diver migration was not very spectacular, with daily totals never exceeding 100 individuals. Summer plumage Black-throated Divers were observed as usual in April and May, totalling some 80 specimens. Also grebes were observed in smaller numbers than usual. A distinct peak of migrating Red-necked Grebes and Slavonian Grebes was recorded in the second half of April.