Clutch and egg size variation of the common moorhen, Gallinula chloropus, was studied in Northeast of Algeria in the Tongalake, classified by the ramsar convention as a natural biosphere reserve. A total of 230 eggs from 43 clutches were measured during the breeding season 2012. Mean clutch size was 5.357±3.129 (range 1-14). Average values of the egg dimensions are as follows: egg length 42.424±3.945mm, egg breadth 29.451±3.297mm and egg volume 19.124±3.756cm3. Egg dimensions were correlated; There was no significant relationship between clutch size and egg measurements.
