Iberian wolf is the smartest and most elusive predator that lives in Spain. Iberian wolves are of medium size with a «thinner build» than the average Eurasian wolf. Males can weigh as much as 90 pounds and females are usually 75 to 80 percent the size of males. Their coat will vary in color from a lighter grey or ochre in the warmer months to a darker reddish brown during the winter. Over 50 percent of the Iberian wolves population is located on the northern part of Castilla y León.