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Showing 1 to 1 of 1 for “"Sea birds--Ontario--Gull Island."”.
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Seasonal variation in the reproductive biology of the ring -billed gull (Larus delawarensis)
The reproductive biology of the Ring-billed Gull (Larus delawarensis) was studied on Gull Island, Presqu'ile Provincial Park, Ontario, in 1976 and 1977. Early started clutches (comprising the majority of clutches on Gull Island) in 1977 produced more chicks per nest (2.20 ± 0.09) than late started …