Natural History Museum Of Zimbabwe

The spread of the House Sparrow Passer Domesticus, in South-Central Africa by R.M.Harwin and Michael, P.Stuart Irwin.

When van der Plaat (1950:41) recorded a pair of House Sparrows, Passer domesticus at Bethlehem in the Orange Free State in August 1949, he could not have realised that he was observing the first stage of population explosion which was, during the next sixteen years, to carry the species 1000 miles or more in three different directions: