You might want to hook it to Pc assistant and run a basic/advanced IMU calibration, just in case your gyros, accelerometer, and compass, have been knocked silly! I'd also do a fresh Tx calibration, and fresh compass cal, just to make sure she is working at 100%. You never know? Maybe not needed, if she is still flying well, but always good procedure, in any event where craft gets banged up, tree, crash, ect. Better safe than sorry, I always say. Solely up to you!
As for the crash? Not sure, maybe look closely at the footage ( if you were filming at the time? ) maybe a clue there? Inspect bird for any signs of contact with foreign object ( bird, bug, bullet hole ) lol bullet hole, just kidding! Mine had ( sure signs of impact with JUNE BUG, as parts of him were still attached to my phantom, poor little guy! I guess he should have cleared his flight path with the tower first?
My bird TUMBLED FROM ABOUT 30' up, out of control, so I PUNCHED the throttle FULL BORE, about 8' from the ground it leveled out, but kept falling, then finally started pulling up, not sure if it actually touched the ground or not, but it was surely close enough! Scary as heck!
But we survived, and all is well!
Hope you find an answer, good luck!
Take care, Fly safe!
( and stay away from those pesky birds )
J Dot