I don't know how trees reboot themselves each year, but this large silver birch in our garden decided to throw all its leaves away in the heat of last summer, and it has failed to start this spring.
This has all the signs of a dead tree. A big dead tree.
On a different tack: How are bees supposed to find this new bee home.
Should I put up signs? "Just Completed! Bee starter homes for rent, over by the dead tree".