Trying to dig a 12 to 30 foot long trench manually will be a nightmare. My recommendation is to bite the bullet and rent a trencher to do the work for you. Even at 12 inches, your work is cut out for you, but 36 inches is really deep.
After the two-month incubation period, the turtle hatchlings all dig out of their nest at the same time, a process that can take several days. As a group, they then leave their nest at night and head directly for the sea. This first trek imprints their home beach into the hatchlings.
How long does a robins egg take to hatch? The American Robin will see their eggs hatch in about fourteen  days, after a mating season that lasts from April until July. The  European Robin, a cousin of the American Râ¦obin though not as large  or brightly colored, has roughly the same incubation period. Their  breeding season begins in March.