Sentence:  I had seen the track of the bear they were after, and I knowed he was a <WSD>screamer</WSD>. 
Meaning of the word marked with <WSD> tags:  A healthy, vigorous animal.<ref name=dofa>John Russell Bartlett, Dictionary of Americanisms — SCREAMER. A bouncing fellow or girl. This, like the word "roarer", is one of the words transferred from animals to men by the hunters of the West.</ref>