The Factor of Bird Collision with Windows and the Consideration for Countermeasure

Abstract

Birds collided with window glasses on the campus of Tsuru University in Yamanashi Prefecture were collected between April, 2003 and March, 2009; the resulting number of birds is 43, 22 species. With some exceptions, it seems that trees near the windows are a factor for the collision. Pale thrushes Turdus pallidus tended to collide in the morning from November to January. As urgent collision preventions, the curtains should be closed and the bird-savers should be placed over the windows.