sentences:  At the opposite end of the scale in vertebrate prey, imperial eagles are known to take mammals down to the size of the Eurasian harvest mouse ("Micromys minutus") and birds down to the size of the Eurasian tree sparrow ("Passer montanus").In Kazakhstan, the estimated size of all prey taken varied from approximately for a locust to for the largest bird prey (i.e.cranes and geese) and for the largest mammals taken (i.e.