Black Redstarts breeding in Britain in 1964-68

This is the first of what is intended to be a series of quinquennial reports, following the previous summary covering the years 1950-65 (Fitter 1965). During 1964-68 the observed breeding and territoryholding population of Black Redstarts Phoenicurus ochruros in Britain (actually all in England) continued to fluctuate, as it has done ever since the first big influx in 1942 and 1945 (see fig. 1 and...