COMPARATIVE STUDY OF YELLOW-BILLED BABBLER (TURDOIDES AFFINIS) FEATHERS REVEALS UNIFORMITY IN THEIR MICROSTRUCTURES AMONG INDIVIDUALS

Swapna Devi  Ray; Prateek  Dey; Nozrul  Islam; Sanjeev Kumar  Sharma; Padmanabhan  Pramod; Ram Pratap  Singh

doi:10.18006/2021.9(1).51.64

Authors

Swapna Devi Ray National Avian Forensic Laboratory, Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore – 641108, Tamil Nadu, India
Prateek Dey National Avian Forensic Laboratory, Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore – 641108, Tamil Nadu, India
Nozrul Islam Vidyasagar Senior Secondary School, Dhubri, Ward No. 15, College Road, P.O: Bidyapara, District: Dhubri, Dhubri-783324, Assam, India
Sanjeev Kumar Sharma National Avian Forensic Laboratory, Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore – 641108, Tamil Nadu, India
Padmanabhan Pramod National Avian Forensic Laboratory, Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore – 641108, Tamil Nadu, India
Ram Pratap Singh Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya - 824236, Bihar, India

DOI:

https://doi.org/10.18006/2021.9(1).51.64

Keywords:

Pennaceous, Plumulaceous, Molecular sexing, Leiothrichidae, Passerine

Abstract

Though a few in numbers, investigations on feather microstructures from the early 20^th century till date, have contributed immensely to various fields such as phylogeny, palaeontology, archaeology, wildlife forensic, biomechanics and so on. However, existing studies on feather micro-structures of birds endemic to the India/Indian sub-continent are few in number and limited in their scope. Also, no study has ever been conducted to compare feather microstructures of different individuals of a species from India. To address this issue, a comparative feather microstructure study of three individuals of Turdoides affinis, a passerine endemic to the Indian sub-continent was done. Select microstructure parameters for five different types of feathers were studied in detail. The molecular sexing method was used to elucidate the sex of T. affinis individuals for gender based differences if any. Results of the study identified that two of T. affinis individuals were female whereas one of them was male. Morphometrically, tail contour was the longest (9.63±0.76 cm) and bristle were the shortest (1.00±0.07 cm) feather. Semiplume had the longest barb length (1.73±0.04 cm) and shortest barbs (0.16±0.01 cm) were present in bristles. Subpennaceous barbs and knob-shaped villi, characteristic of members of the Passeriformes family, was also observed in all three individuals. This study records no significant difference in feather characteristics amongst the three T. affinis individuals irrespective of the differences in their sex and size. Systematically documented feather micro-characteristics of T. affinis in this study could be used as a species identification tool and would provide baseline data for the feather catalogue of Indian bird species being compiled at SACON.

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