<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Plumage colouration is important for birds as it helps them in camouflage, mate selection, social signalling and various other physiological and behavioural processes. The most common pigments responsible for colouration are melanins and carotenoids. In a few individuals, colouration is disrupted due to various causes. The most common colour aberrations found in birds are leucism, albinism, melanism, carotenism, schizochroism and dilution whereas xanthochroism is a lesser-known phenomenon. In this article, five records of colour aberrant Coppersmith Barbet <italic>Psilopogon haemocephalus</italic> are reported. The authors along with the help of citizen scientists observed four individuals with disruptions in plumage colouration from different areas of West Bengal and Assam, India and one from Rajsahi, Bangladesh. Due to the lack of melanins, the birds were mostly yellowish and whitish in colouration with or without some normally coloured feathers on the head and wings. The carotenoid deposition was unaffected in the case of the observed adults and juveniles. These records can be cited as xanthochroistic individuals resulting from leucism. This is the first record of such colour aberration for Coppersmith Barbet from the whole of its distribution range.</p>
</abstract>

Plumage colouration is important for birds as it helps them in camouflage, mate selection, social signalling and various other physiological and behavioural processes. The most common pigments responsible for colouration are melanins and carotenoids. In a few individuals, colouration is disrupted due to various causes. The most common colour aberrations found in birds are leucism, albinism, melanism, carotenism, schizochroism and dilution whereas xanthochroism is a lesser-known phenomenon. In this article, five records of colour aberrant Coppersmith Barbet Psilopogon haemocephalus are reported. The authors along with the help of citizen scientists observed four individuals with disruptions in plumage colouration from different areas of West Bengal and Assam, India and one from Rajsahi, Bangladesh. Due to the lack of melanins, the birds were mostly yellowish and whitish in colouration with or without some normally coloured feathers on the head and wings. The carotenoid deposition was unaffected in the case of the observed adults and juveniles. These records can be cited as xanthochroistic individuals resulting from leucism. This is the first record of such colour aberration for Coppersmith Barbet from the whole of its distribution range.

“Leucism resulting in xanthochroism” – A report on colour aberration in Coppersmith Barbet <italic>Psilopogon haemacephalus</italic> from Asia

PG Department of Conservation Biology, Durgapur Government College

Ornis Hungarica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

“Leucism resulting in xanthochroism” – A report on colour aberration in Coppersmith Barbet  from Asia

Plumage colouration is important for birds as it helps them in camouflage, mate selection, social signalling and various other physiological and behavioural...

“Leucism resulting in xanthochroism” – A report on colour aberration in Coppersmith Barbet Psilopogon haemacephalus from Asia

Pubblicato online: 30 giu 2022

Pagine: 69 - 79

Ricevuto: 12 feb 2022

Accettato: 24 apr 2022

DOI: https://doi.org/10.2478/orhu-2022-0005

Parole chiave
xanthochroism, carotenoids, melanin, Megalaimadae, India, Bangladesh

© 2022 Debayan Gayen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

“Leucism resulting in xanthochroism” – A report on colour aberration in Coppersmith Barbet Psilopogon haemacephalus from Asia

Pubblicato online: 30 giu 2022

Pagine: 69 - 79

Ricevuto: 12 feb 2022

Accettato: 24 apr 2022

DOI: https://doi.org/10.2478/orhu-2022-0005

Parole chiavexanthochroism, carotenoids, melanin, Megalaimadae, India, Bangladesh

© 2022 Debayan Gayen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Parole chiave
xanthochroism, carotenoids, melanin, Megalaimadae, India, Bangladesh