On 21st September 2023, at Gunung Brinchang, Cameron Highlands, Pahang, Malaysia, I had an opportunity to see a number of juvenile Mountain Tailorbirds Phyllergates cucullatus. There are not that many observations or images of juveniles. In the Macaulay Library 6 images out of 664 are of juveniles (2 are of an immature bird, the other 4 of older juveniles).
The first bird shown is of a dependent juvenile, still being fed by adults. The next two images are of a juvenile that was self-feeding with no adults around. The last image is of an adult parent of the first bird for comparison.
Juveniles lack the orange-chestnut present in the anterior cap to mid-crown of the adults. They have an olive-grey crown with grey at the nape.
The underparts are pale yellow compared to the bright yellow of adults.
The olive of the upperparts is duller.
The iris appears brown
Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia