Diet of Nesting Gull-billed Terns in Eastern Spain

  title={Diet of Nesting Gull-billed Terns in Eastern Spain},
  author={Jos{\'e} Ignacio Dies and Jennifer Mesa Mar{\'i}n and Carlos P{\'e}rez},
Abstract The prey displayed to mates and delivered to chicks by nesting Gull-billed Tern (Sterna nilotica) was studied in a colony on a coastal lagoon in eastern Spain during 2003. During 31 hours of observations, 1,091 prey items were observed. The trophic resources exploited by the species and seasonal differences in prey composition within the same breeding season were examined. Red Swamp Crayfish (Procambarus clarkii) was the main prey species (64% of prey items), followed by insects (17… 

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