Hallux lengthened, perfectly incumbent, with large claw. Tarsi
scutellate. Middle claw pectinate. Bill perfectly straight,
tapering, acute. Loral region definitely naked, continuous with
covering of the bill. Head narrow, elongate, tapering … _Ardeidæ_.
Hallux somewhat reduced, less perfectly incumbent. Tarsi commonly
reticulate. Middle claw not pectinate. Lores, gular space and
usually more of the head, naked. Bill variously curved or with
expanded tip. (Genera _Tantalus_, _Ibis_, _Mycteria_, and
_Platalea_.) … _Tantalidæ._