Pigmentation of Eggs: Variation in the Clutch Sequence

Abstract

The material herein reported upon comprises a collection of some twenty clutches of eggs of the Laughing Gull (Larusatticilia) collected in 1952 from the saltings east of Stone Harbor, New Jersey, being the same collection that was analyzed for shape in a previous report (Preston and Preston, 1953), and a collection of twenty-two clutches, of three eggs each,of the Common Tern (Sterna hirundo), collected in 1953 from the high-level sand-flats south of Stone Harbor, being the same collection analyzed for shape in another previous report (Gemperle and Preston,1954). Some reference is made briefly to a small, and inadequate, collection of eggs of the Least Tern (Sterna albifrons) collected in 1953 south of Stone Harbor and north of Anglesea, New Jersey