These are OK. As long as they survive deforestation in sufficient quantity and there are seeds left to spread in the area. The last thing shakes limits of probability of effective reforestation by bird to improbable.
Not a great start-up idea unfortunately.
There are too few of them to replant at anything remotely the rate at which we remove trees.
they don't have "drone" in their names
Easy. Call your trained birds "bio-drones".
Well if you only deforest some trees and leave some left at even spaces the trees will naturally spread back to the area by dropping their seeds.