Comparative analysis or prey caught by the Common Tern Sterna hirundo and the Little Tern Sterna albifronson the Po river and delta

Boldreghini P., Magagnoli P. & Toso S.



Abstract:

The diet of the Common Tem Sterna hirundo and the Little Tern Sterna albifrons was investigated in two areas of the Po River Plain by an analysis of prey collected around nests. A high difference between the two areas was found for both Tems. The two species overlapped great1y in tbe middle Po, while a high trophic segregation existed in the Lagoon of Comacchio. In both areas the Common Tern preyed on larger fish than did the Little Tem.