7 References
Henderson, H., Parrott, D. & Moore, N. (2004 ) Racing pigeons - impact of predation.SNH, Edinburgh.
Marcström, V. & Kenward, R.E. (1981) Movements of wintering goshawks in Sweden. Swedish Game Research 12:1-35.
Newton, I. (1986) The Sparrowhawk. T. & A.D. Poyser, Calton.
Newton, I. (2002). Eurasian Sparrowhawk (Sparrowhawk) Accipiter Nisus. In Wernham, C., Toms, M., Marchant, J., Clark, J., Siriwardena, G. & Baillie, S. (eds). The Migration Atlas. Movements of the Birds of Britain and Ireland. Pp.235-237. T. & A.D. Poyser, London.