(2205) Pseudibis davisoni.
Davison' Black Ibis.
Geronticus davisoni Hume, Str. Feath., iii, p. 300 (1875) (Tenasserim). Inocotis davisoni. Blanf. & Oates, iv, p. 364.
Vernacular names. None recorded.
Description. In plumage exactly like the preceding bird.
Colours of soft parts. Iris orange-red; bill bluish or plumbeous-blue ; the skin of the head is black and there are no papillae, though the skin, more especially on the forehead and fore-crown,. shows some corrugations and obsolete papillae coloured paler than the forehead itself; the hind-nape, running forward to the ears and joining on the throat, pale blue ; legs and feet pale coral-red.
Measurements. Wing 393 to 428 mm.; tail 192 to 208 mm.; tarsus about 91 to 99 mm.; culmen 156 to 192 mm.
Young like those of the preceding bird.
Distribution. Eastern Upper Burma to Pegu, Tenasserim, Cochin China and Siam.
Nidification. Oates found this Ibis breeding in Pegu in February, whilst Grant and Packard obtained eggs at Myingyan, Upper Burma, in March. In each case there were two hard-set eggs in the nest and the latter was placed in a tree between fifteen and thirty feet from the ground. The eggs are not distinguishable from those of the preceding bird and seven average 63.0 x 43.2 mm.
Habits. Quite similar to those of Inocotis papillosus, though this bird may perhaps be met with more frequently in marshy land. The call is said to be loud, harsh and strident, though seldom uttered, and its food to consist principally of locusts, grasshoppers and seeds. It is a solitary bird, found in pairs only, and neither breeds in colonies nor together with Herons and other birds, nor does it associate with others when feeding.