Image keeps her sickle out, but draws one her hammer... She pauses, though. Chucking anything at a nest might attract the attention of the hornets. So, she decides to distract those that remain.

"I believe the truth before my eyes... they shall believe it, too. I call now this minor illusion." Image creates an auditory illusion of a man as far away from the other hornets as possible, screaming something about how much he dislikes hornets.

With any luck, this will distract the winged demons, enabling Image to throw her weapon at it and knock as much of it as possible from the tree.

(1d20+2)[21]
(1d20+2)[5]

"Image" - Half-Elven Warlock of the Celestial
Spoiler: Out of Character
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Attempting to dislodge nest with a thrown hammer. Disadvantage rolled because I assume it's a bit high off the ground!