Explaining to them what these 'birds' look like, and that they only come out in the middle of the night.
Get them to stand in the middle of a field or woods.
Explain to them that you will 'scare' the 'birds' towards them, and for them to be prepared to catch.
And leave them out in the woods for a good hour or so, Then go scare the crap out of them.
OT1: ...What's a Snipe?
Corbs: Its a large flightless bird
OT1: There are large flightless birds at Bement?