The patterns shown in this figure are really interesting. Results from a year-round study would be of interest as well.

The fact that, while American Robins were the most abundant species, only the juveniles collided with windows suggests that this species has to learn about the properties of windows either through personal experience or by watching others to know that they need to avoid flying into them. One way they could learn is by remembering what windows are where in their environment, but since this is a mig...

The reason I ask this question is that one side of our lab building is attractive as a site for nesting house martins, Delichon urbicum, who place their nests close under the hanging eaves but in almost all cases immediately above a window. Ours is not the only building in the village where they build nests over windows and they also do it on some domestic premises. This placement of nest was so...