Gulp?

The magpies on the golf course seemed to be hanging out together this morning, there were a couple of dozen in this tree alone. And all facing into the wind!
I was trying to think of the name for a group of magpies but couldn't remember. Cue Google: a conventicle (never heard that), a tiding (nope, that neither), a mischief (yep, that sounds familiar), a gulp (I like that one). So that's my blip .... a gulp of magpies.