(1806) Astur badius butleri.
THE CAR NICOBAR SHIKRA.
Astur butleri Gurney, Bull. B. O. C, vii, p. 27 (1898) (Car Nicobars); Blanf. & Oates, iv, Appen., p. 486.
Vernacular names. None recorded.
Description. A small very richly -coloured form of A. badius with only one subterminal bar on the tail in adult birds and only three or four bars on the tail in the young ones; the under wing-coverts and wing-quills are unbailed, the coverts pure white.
In the young bird the feathers are more broadly edged with deeper rufous, making these parts much more rich in colour than in any of the preceding races.
Female. The bird obtained with the type male is much more rufous everywhere than any specimen of any other Astur badius in the British Museum. The upper parts are all rufous lightly marked with blackish; a patch of the same on the nape and two distinct and one obsolete black bar on the tail; the underparts are white marked profusely with rufous in streaks on the breast, changing to bars on the abdomen and to large drops on the thigh-coverts.
Colours of soft parts. Iris bright orange ; feet yellow.
Young. Iris greyish-white; feet pale lemon; bill black, base bluish ; cere pale green; eyelids greenish (Gurney).
Measurements. wing 180 mm.; tail 152 mm.; tarsus 43 mm.; culmen 29 mm. "Wing 173 mm.; tail 134 mm.; tarsus 48 mm." (Gurney). In the British Museum specimen (juv.) the fourth primary is longest.
Distribution. Car Nicobars. Dr. Abbott thought he saw this race in Camorta.
Habits. Nothing recorded.
* Kirke-Swann separates the Shikras from Siam and the Indo-Chinese countries as A. b. klossi on account of their somewhat smaller size (Mon. Accipitres, part iv, p. 217 , 1925). My measurements do not endorse this.