A. A. THASUN AMARASINGHE, D. M. S. SURANJAN KARUNARATHNA & DEEPAL WARAKAGODA
Sri Lanka Whistling Thrush Myophonus blighi is a globally threatened bird species (IUCN status Endangered) endemic to Sri Lanka, found mainly
between 1,200 m and 2,100 m, where it is confined to densely wooded, ferny ravines and gorges, especially those with a rapid torrent running through them. Its food is reportedly mostly insects, but snails are also considered important and it has been recorded eating reptiles and amphibians including geckos, small Calotes or Ceratophora lizards and tree frogs (probably Polypedatus) (BirdLife International 2001).
Between 09h15 and 10h15 on 29 March 2006 at Riverstone in the Knuckles Forest Region (altitude:1,385 m) in Matale district in Central
province of Sri Lanka (7º24'55"N 80º48'35"E) we watched a mature male Sri Lanka Whistling Thrush foraging on the ground. The temperature at that time was 23oC, the humidity 79%, the weather cloudy.
First the bird hopped slowly towards us up to c.1 m distance. Then it jumped over a small dead stem lying on the ground and caught a mature male Sri Lankan Leaf-nosed Lizard Ceratophora tennenti (Plate 2) sitting on the bole of a small Keena tree Calophyllum walkeri. The bird caught the prey by its neck and dashed it twice on the dead stem, but the lizard then escaped and ran about a metre before the bird jumped over and caught it again at the neck. Again the bird dashed the lizard twice, this time on a rock, then took it under a shrub and beat it a third time on another rock. The first two dashes using the rock were done slowly, the third one was quicker and so powerful that the lizard was thrown about 60 cm.
The bird retrieved it and returned to the rock on which it had just dashed it. After 30 seconds it repeated the same action, and over the course of half an hour it beat the lizard 49 times mainly in groups of three.
After this treatment the bird released the dead prey and rested for about a minute, then caught the lizard by the snout, ventral side upwards, and manuscript, Dr. Zeenia Nissam of the Department of Zoology, Open University of Sri Lanka, for her generous support for the field visit, Mr. Kelum Manamendra-Arachchi (WHT–Wildlife Heritage Trust), Mr Kasun Ekanayake and Mr F. S. Abeywickrama (YZA–Young Zoologists' Association of Sri Lanka) for valuable help in preparing this paper.
Figure 1. Stages in the catching and eating of a lizard by a Sri
Lanka Whistling Thrush Myophonus blighi. (a) The bird hops
slowly towards the lizard. (b) It catches the lizard at the neck.
(c) It starts to swallow the prey head-first. (d) The lizard's tail
projects from the bill.
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