Which fish species are specifically listed as forming a significant part of their intake in certain regions?

Answer

Alewife, smelt, and yellow perch

Specific fish prey noted to be consumed by the Ring-billed Gull include the alewife, smelt, and yellow perch, alongside the nine-spined stickleback.

Which fish species are specifically listed as forming a significant part of their intake in certain regions?
dietbirdanimalgull