chicken louse vs biting louse

chicken louse and biting louse both are nouns.

Word	Noun	Adjective	Verb	Adverb
chicken louse	Yes	No	No	No
biting louse	Yes	No	No	No

As nouns, biting louse is a hypernym of chicken louse; that is, biting louse is a word with a broader meaning than chicken louse:

chicken louse: a louse parasitic on poultry
biting louse: wingless insect with mouth parts adapted for biting; mostly parasitic on birds

Other hypernyms of chicken louse include bird louse, louse.

chicken louse (noun)	biting louse (noun)
a louse parasitic on poultry	wingless insect with mouth parts adapted for biting; mostly parasitic on birds