You hyphenate adjectival forms, e.g., two-year-old colt or two-year old.
"Scrub" is a modifier and since there's no doubt what's being modified,
you leave it out. Hyphens and habitat, huh? Nuh-uh, Burt. Return to
your Chicago Manual of Style.
Irene


On Wed, 2 Aug 1995, Burton Guttman wrote:

>
...."Scrub-jay" reminds us that these are birds
> of scrubby habitats. "Scrub jay" might be misinterpreted to mean that
> these are second-string players on the birdy team or, even worse, as an
> order to give those jays a good hard cleaning.
>
> Burt Guttman guttmanb at elwha.evergreen.edu
> The Evergreen State College Voice: 360-866-6000, x. 6755
> Olympia, WA 98505 FAX: 360-866-6794
>
>