Part 2: Winners and Losers - passerines
And now for the passerines - as per yesterday's post, all my own data... House Martin LOSER Declining summer visitor, passage migrant This species is greatly reduced as a breeding bird. In the 1970s it was easy to find nests on houses in Sutton and flocks above suburbia in the height of the summer were to be expected. This is not the case now. Extreme dates: 3 April 2010 ( Holmethorpe ) - 22 October 1978 ( Beddington SF ). Spring passage can be small and brief (peak count of 350 at Holmethorpe on 3 May 2010), while that of autumn heavier and more protracted, as evidenced by 6,710 south on 21 September 2017 at Canons Farm, Banstead ; 2,185 south-west on 9 October 1999 at Holmethorpe ; 1,900 south-west on 25 September 2014 at Canons Farm, Banstead ; 600 on 12 September 1976 at Beddington SF ; 500 on 31 August 1976 at Beddington SF and 20 September 2017 at Holmethorpe . Tree Pipit LOSER Summer visitor, passage migrant and former breeder. ...