“Saw a family unit of Oriental Pied Hornbill (Anthracoceros albirostris convexus) – adults with two juveniles. I suspect they (and Imperial Green Pigeons) had come to feed on Oli Palm fruit. They were making lots of calls.
“Of interest to me was the build up to calls by juveniles followed by loud additions by the adults, especially the male.
“Above images show the 2 juveniles.
“A full sonogram/waveform is shown above – notice the ‘hesitant’ calls by juveniles and then the fully adult entry below.
Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia
1st May 2016
Location: Sepilok, Sandakan, Sabah, Borneo, Malaysia
Habitat: Oil Pam Estate with adjacent secondary growth and mangrove jungle