(130) Garrulax leucolophus diardi.
THE SIAMESE WHITE-CRESTED LAUGHING-THRUSH.
Turdus diardi Less., Traite d'Orn., p. 408 (1831) (Siam). Garrulax diardi, Blanf. & Oates, i, p. 79.
Vernacular names. None recorded.
Description. Differs from the other two races by the grey of the crest merging into the rufous back instead of contrasting therewith. The whole of the abdomen is white.
Colours of soft parts as in the other races.
Measurements. The largest of the three races with a wing between 135 and 140 mm.
Distribution. Extreme South Yunnan, Siam, Cambodia, Annain, Cochin China, rarely extending into South-East Tenasserim, and then in a somewhat intermediate form approaching belangeri. The specimens in the British Museum from the Shan States and Annam labelled "diardi" should all be referred to the last race, belangeri.
Nidification. Similar to that of the other races. Twelve eggs average 27.4 x 22.4 mm., but a larger series would probably average bigger.
Habits. Like those of the other races but this form appears to be found well into the plains.