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.
