W.A.G.B.I. hand-reared Mallard in the cold spell of 1962-63

Abstract

Recoveries of W.A.G.B.I. hand-reared Mallard during and after the hard weather of 1962-63 show that these duck undertook a marked weather migration, with a directional bias between S.E., through W. to N.W. Mortality figures as available at present indicate that there was some increase resulting from the cold spell.