Necked imp. & p. p. : of Neck

Necked a. : Having (such) a neck; -- chiefly used in composition; as, stiff-necked.

Necked a. : Cracked; -- said of a treenail.

Example:
What jacket is best to wear with a high Necked top?

Taxonomy
Black-necked Stilt, Birds, nests, Himantopus mexicanus, Stilt, populations, salt ponds, species, mudflats, flocks, breeding, Hawaiian Stilt, Black-winged Stilt, of the Black, breeds, Rigney, IUCN, free encyclopedia.

Defination from the web:
necked Stilt (Himantopus mexicanus) is a locally abundant shorebird of American wetlands and coastlines. ... In Arizona, Black-necked Stilts may been seen along artificially-created lakes and drainage basins in the Phoenix metropolitan area, in remnant riparian habitat. ...