Colley or Box?
Looking back eastwards from White Downs earlier this week and already this autumn's birding was on my mind. Set out before us are the three 'peaks' on the North Downs that are within my uber patch. I have vis-migged from all three, but not often enough to be able to have a firm idea as to where is best. Obviously the time of year and the weather conditions play a part in which one demands my attention. Last autumn I spent more time at Box Hill and had some success (with thrushes) whereas Colley Hill fared better for finches. Ranmore didn't perform well at all. I plotted the main flight lines at the time and repeat them below. October 2019 - Box Hill migrant flight lines (mainly thrushes) October 2019 - Colley Hill migrant flight lines The questions that are really taxing me at the moment are these. Colley Hill is further east than Box Hill. Have all (or at least most) of the birds that pass Box Hill westwards along the scarp passed Colley Hill on the way?