Sentence:  There have been cooing doves , chattering magpies , thieving jackdaws , a proud peacock , a silly goose , and a harpy eagle - whom I was silly enough to mate with and who <WSD>is</WSD> now busy tearing at my vitals '' . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)