
The March Full Moon has been called: Worm Moon, Sap Moon, Crow Moon, Crust Moon
Worm Moon
The softening of the ground, earthworms becoming active, all admist the chirping of robins who beckon spring and ate the earthworms...the March moon was named for the earthworm. The sighting of earthworm casts (excretions) proved evidence of their activity that would yield fruitful crops to a hungering people.
Sap Moon
With the arrival of spring the sap began flowing in the maple trees, yielding delicious syrup for a hungering people. It was time to tap the trees for the amber gold.
Crow Moon
The return of crows, constantly cawing, signaled the end of the tranquility of winter.
Crust Moon
Warmer days and cold nights creating a daily thaw-freeze cycle led to a layer of crust on the snow. Hence Crust Moon.
Resources:
https://www.almanac.com/content/full-moon-march
https://www.farmersalmanac.com/full-moon-dates-and-times