Email from School administration.

[gremcint]

Hello everyone: With the warm weather, I understand the desire of people in rooms with windows that open, to open them to enjoy the warm spring air. However, we have had two instances in the last 24 hours of people leaving their windows open and having birds enter the room. In one case the window was open long enough for a pair of pigeons to make a nest and lay and egg (not to mention other biological functions) within the room. Please if you open the window in your room make sure it is closed before you leave.

[Pimento]

It's called a screen....$10 per window. Problem solved