Sentence:  The dogs, with eager yelp,/ Are struggling to be free;/ The hawks in frequent stoop/ Token their haste for flight;/ And <WSD>couchant</WSD> on the saddle-bow,/ With tranquil eyes, and talons sheath'd,/ The ounce expects his liberty. 
Meaning of the word marked with <WSD> tags:  Lying with belly down and front legs extended; crouching.