whats the differences between 

the Whoopin crane & sandhill crane?

sandhill crane

Adults are gray overall; during breeding, the plunmange is usually much worn and stained, particularly in the migratory populations, and looks nearly ochre. 

Whoopin crane

s morphologically not reliably distinct and was never unequivocally accepted as valid subspecies.^]The other can be somewhat more reliably distinguished in hand by measurements and plumage details, apart from the size differences already mentioned. 

About the two especies

The two southern U.S. resident populations are somewhat more distinct, while the Cuban population has been comparatively little studied but appears to have been established on the island for a long time.