Aerial Alarm

This spell works like the Alarm spell, except that the alarm only sounds when a flying creature or machine of Medium size or larger enters or touches the warded area. You set an alarm against unwanted intrusion that extends in a cylinder up to a 100-foot radius and 500-feet tall. When you cast this spell, you may designate creatures or machines that do not trigger its effects.

A mental alarm alerts you with a ping in your mind if you are within 1 mile of the warded area. This ping awakens you if you are sleeping.

An audible alarm produces the sound of a hand bell for 10 seconds within 60 feet.