Nachttrek van Grote Sterns Sterna sandvicensis door het binnenland
Sula , Volume 6 - Issue 2 p. 56- 57
Sandwich Terns were heard migrating SW in Zaandam during the night on 22 July 1991 (22:50-23:05 MEST). The weather was calm, no wind, ground mist, 80% overcast. The ca. 10 terns, including at least 1 juvenile, flew rather low. Inland records are very rare of this species.
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