404 GYPAETE—HALLUX 
their plumage being black and white.  G. tibicen has a wide range in 
Australia, while G. leuconota is 
restricted to its southern and 
western parts. Tasmania has 
a smaller race of the former, 
or distinct species, as some 
regard it: the Organ-bird of 
the colonists, G. hyperleuca, to 
Xs correct the name originally 
SSES5) bestowed on it by Gould 
% (Proc. Zool. Soc. 1836, p. 106), 
or organica. 
GYPAETE, intended as an Anglified form of Gypaetus (LAM- 
MERGEYER). 
\ 
5 
GyMNORHINA. (After Swainson.) 
GYRFALCON, from the Low Latin Gyrofalco, but the etymology 
of that is doubtful, the best authorities differing concerning it. 
Some would have it from the verb gyrare, to circle, others from 
Geier, a Vulture, and this from the Old High German giri, greedy, 
while others again say that Greer is allied to gyrare. All agree, 
however, in denying that there can be any derivation from Hiero- 
falco, which is a hybrid word of modern invention (see FALCON). 
Hf 
HACKBOLT, HAGBOLT, and HAGDOWN, names said to be 
given by the people of Scilly and Man to the larger of the species 
of SHEARWATER with which they meet, if indeed they recognize any 
distinction, and in one form or other used, it would appear, also on 
the east coast of North America. 
HALCYON, Greek dAxvev (the h being redundant), a poetical 
name for the KINGFISHER. 
HALF-BIRD, a common fowler’s name for the smaller kinds of 
Duck, especially the TEAL, which bring only half-price, or something 
like it, when sold. 
HALLUX, the first digit of the foot, commonly known as the 
“hind toe” from its backward direction in most birds. When 
fully developed it consists of only two phalanges, its metatarsal 
is reduced to the distal portion, and is only loosely attached to the 
inner and hinder surface of the other three coalesced metatarsals. 
As regards position, structure and size, the Hallux is the most 
