Common Tern Sterna hirundo mating with two females successively in one season
Ludwigs, J.-D. (2005). Common Tern Sterna hirundo mating with two females successively in one season. Atlant. Seabirds 7(2): 90-92
In: Atlantic Seabirds. Seabird Group and Dutch Seabird Group: Sandy, Bedfordshire. ISSN 1388-2511, more
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