T H E following incubation- and fledging-periods were obtained in 1928 (A) in west Sussex, (B) in north Wilts.; the incubation-periods being calculated from the day on which the last egg was laid and the fledging-periods from the day or days of hatching until the day or days of departure from the nest.Rook (C. / . frugilegus) 16 Carrion-Crow (C. c. conne) ... -- Greenfinch (Ch. ch. Moris) ... --Re...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now