Attributes / relations provided by
♦ 1Robert Gwiazda, Dariusz Bukaciński, Grzegorz Neubauer, Marcin Faber,
Jacek Betleja, Magdalena Zagalska-Neubauer, Monika Bukacińska
& Przemysław Chylarecki, Diet composition of the Caspian Gull (Larus cachinnans) in inland Poland: effects of breeding area, breeding stage and
sympatric breeding with the Herring Gull (Larus argentatus), Ornis Fennica 88:80–89. 2011
♦ 2The prey spectrum of Natrix natrix (LINNAEUS, 1758) and Natrix tessellata (LAURENTI, 1768) in sympatric populations (Squamata: Serpentes: Colubridae), ERNESTO FILIPPI & MASSIMO CAPULA & LUCA LUISELLI & UMBERTO AGRIMI, HERPETOZOA 8 (3/4): 155 -164 Wien, 30. Jänner 1996