The one time when there are likely to be few, if any, casualties is on a clear night with a full moon. On these nights, the birds fly at higher altitudes and are able to avoid the towers. Walk along close to the building so that if you do startle the bird, it will fly away from the building, not into it. If possible, work the bird into a small area or corner so that you may lessen the possibility of the bird doing further injury to itself. The use of a net, such as a butterfly net, should be reserved for those instances when hand capture is not possible since there is the possibility of hitting the bird with the frame of the net and causing further trauma.
Some rescuers find that a mist net works well.
Gently toss the net over the bird and then carefully remove the bird from the net. Place the bird in a brown waxless paper bag, secure with paper clip and label. Dexamethasone is to be administered by trained volunteers only. Extreme caution and specialized equipment must be used in handling these birds. If you do not have experience and proper equipment, do not attempt to handle the bird but call for help from a volunteer experienced in bird of prey handling.