This video from Bermuda says about itself:
Zephyr, CahowCam2’s star chick, is now at 92 days post-hatch and could be ready to take its first flight tonight! Watch it preen away in the nesting burrow on June 8. Could the young Bermuda Petrel be making sure its feathers are primped, preened, and ready for liftoff? Find out by watching live!