windows
Can you help me identify or suggest what you'd refer to this type of window that has a rotation handle powering a worm gear that drives the rod to open or close the window?
Basically, what do you call this kind of window, as opposed to, e.g. double hung etc.
The standard approach to sealing the top of the lower sash raised for the AC is a foam strip placed between the outward facing uper edge of the inner sash and the outer glass pane.
This gap is on the inside of the house.
The birds you mention must be getting in through the lower gap between the lower rail of the upper sash and the glass pane on the inside sash. There is no reason you could not use the same type of foam insulator on the outside (assuming you can safely reach the window). While this is not a hard barrier that will prevent a forceful assault by a determined attack bird, it probably will be enough to discourage the accidental intruder.
The foam will likely deteriorate much more quickly outdoors, but should last a season.
Just go over all of the edges with a utility knife. If that doesn't work then go in deeper with a putty knife... And if that doesn't work buy a window zipper.
Best Answer
A window hinged at the side is called a casement window.
More specifically, that is a slide hinge, manual, sector crank casement window.
Different manufacturers may have a different name for the 'slide hinge' style. Its purpose is to allow easy cleaning of the outside of the pane.
It's 'manual' because you turn the crank by hand. Some industrial buildings have motorized window cranks.
I'll take your word for it that it has a worm drive. Mine have little pinion gears. If the mechanism includes a member that looks like a partial gear wheel attached to a lever, that's a 'sector crank'.
If you're searching or shopping for this kind of window, don't bother with the 'worm drive' and 'sector crank' terms as these vary with manufacturer choice. Use the terms 'casement' and 'slide hinge' to find these kinds of windows.