Literature
- Ramos J.A., Sola E., Monteiro L.R. and Ratcliffe N. 1998. Prey delivered to Roseate Tern chicks in the Azores. Journal of Field Ornithology 69: 419-429.
- Silva M.A. 1999. Diet of Common Dolphins, Delphinus delphis, off the Portuguese continental coast. J. Mar. Biol. Ass. U.K. 79: 531-540.
- Witt H.-H., Crespo J., Juana E. de and Varela J. 1981. Comparative feeding ecology of Audouin's Gull (Larus audouinii) and the Herring Gull (L. argentatus) in the Mediterranean. Ibis 123: 519-526.