420 PICNONOTIDjE. 



(435) Pycnonotus plumosus robinsoni. 



KOBINSON'S OLIVE BULBUL. 



Pycnonotus robinsoni Ogilvie-Grant, Fasciculi Malav., p. 8-5 (1905) 

 (Patani, Malay Pen.). 



Vernacular names, j^one recorded. 



Description. Differs from P. plumosus " by having more dis- 

 tinct white shaft-streaks to the feathers of the cheeks and ear- 

 coverts ; the outer edges to the quills dull greenish, not olive-green, 

 and the middle of the breast and belly pale yellowish white." 



This form is nearest to P. p. blanfordi, from which it is 

 separable by its much darker plumage above and below. 



Colours of soft parts. Iris brown ; bill brownish-horn ; legs 

 and feet blackish-lead. 



Measurements. Much the same as those of P. p. plumosus. 

 "Wing 83 to 89 mm. : culmeu about 15 mm. 



Distribution. From Patani in the extreme South of Peninsular 

 Siam, up the East Coast, perhaps entering the borders of Tenas- 

 serim near Tavoy, as far North as Ayuthia, Natrang and 

 Kraben. There are also specimens in the British Museum col- 

 lection from Annam. 



Nidification. Messrs. Williamson and Herbert collected and 

 examined vast numbers of nests and eggs of this Bulbul round 

 Bangkok, where it is exceedingly common. They are quite 

 indistinguishable from others of this genus but when considered 

 as a whole are very poorl} r marked, pale eggs with none of the 

 rich variations seen in so many Bulbuls' eggs. 100 eggs average 

 21-6x1 5-6 mm., the extremes being 23'Oxl6-2, 22-2xl6'7 and 

 20-1x15-1 mm. 



The birds breed in light and heavy forest and also in scrub and 

 busiies round about cultivation and villages. Out of 76 clutches 

 examined by Mr. W. Williamson only four nests contained three 

 eggs, tue rest only two each. The breeding season is from 

 January to July. 



Habits. They are very familiar birds, far more so than the 

 Large Olive Bulbul, and freely euter gardens, orchards and 

 cultivated country. In winter they are found in small flocks and 

 are restless, energetic birds, constantly flying from one tree to 

 another in search of their food, which consists of berries and insects. 



(436) Pycnonotus plumosus blanfordi. 



BLANFOHD'S OLIVE BULBUL. 



Pycnonotus blanfordi Jerdon, Ibis, 1862, p. 20 (Pegu) ; Blanf. & 



Gates, i, p. 291. 



Vernacular names. Hyu, Bo-sa-mwe (Burmese) ; Bo-sa-mwe 

 (Kachin). 



Description. Differs from Robinson's Olive Bulbul in being 



