Royal Tern (Sterna maxima) Science Article 2
We studied the predator-prey interaction between Kelp Gulls Larus dominicanus and Royal Terns Sterna maxima and Cayenne Terns Sterna eurygnatha at Punta Leon, Argentina, from 1990 to 1992. Kelp Gulls were the main predator of tern eggs in all 3 years, accounting for 99% of observed predations (n = 454).
PABLO YORIO and FLAVIO QUINTANA, Ibis, Vol. 139(3), p. 536-541