Question

at present there are two species of squirrels do they have similarities they cannot perform reproduction between them how can this kind of changes be considered as beneficial for species

Answer 1

this can be benificial and harmful both

Answer 2

this have more harmfulness than benifits
may cause damage to the body of squirrels internally or externally.
the bady born may be physically unfit or metally weak in activities or may be abnormal