I give 'em a nice and loud "WCFY, WCFYA?"
Like others have already said, if you know who you're playing with and where they're located exactly; listening to everyone in the spring woods wake up on their own is awesome.
But, if there's any question as to who and where everyone is, then the earlier I can get em talking and I can take roll call- the better! Then I can figure out a game plan and take 'em to school.
And, if all else fails and the Thunder Chickens are tight-lipped, then at least I can usually strike up a conversation with Mr. Owl. He always seems chatty!