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A survey on the mammal species from a peri-urban coal mining plateau of Eastern India
Debayan Gayen, Paromit Chatterjee, Tapajit Bhattacharya,
Volume 3, Issue 3 (9-2021)
Abstract
The present study was conducted to determine the diversity of mammalian species from a peri-urban coal mining region of West Bengal for almost three years from September 2017 to August 2020. The survey was done on the basis of direct sightings, extensive searches, detection and identification of indirect mammalian signs such as pug marks and droppings, opportunistic sightings and road-kill incidents. Secondary information from previous literature and information from local people, citizen scientists and Forest Department were also included in the study. A total of 20 mammals belonging to 9 orders, 15 families and 20 genera were observed from 31 locations during the present study and 6 species belonging to two orders, three families and four genera which were previously reported from the present study location but not observed during this study were also included in the list. Two endangered species, Asian Elephant Elephas maximus and Indian Pangolin Manis crassicaudata, were observed from the present study location within the study period. Based on the habitat types, the maximum number of species was observed from the Human Habitation (HH) areas whereas the least number of species was noted from the Riverside Zones (RS). Proportion of the different habitat types for each mammalian species found in the present study and also obtained from literature depicted that Asian House Shrew Suncus murinus, Asian Palm Squirrel Funambulus pennant and Indian Pygmy Pipistrelle Pipistrellus mimus were among the most abundant mammals in the study area. Golden Jackal Canis aureus was observed from a wide variety of habitat types whereas the two varieties of civets were only observed from the riverside areas. Principle Component Analysis between species and habitat type indicated that the Bengal Fox Vulpes bengalensis and the Black-naped Hare Lepus nigricollis were only associated with the grasslands. The Hanuman Langur Semnopithecus entellus and other small rodent species were generally found in the human habitation areas. Various threats like habitat destruction, habitat degradation and hunting posed the major problems in the present study location.
 

First report of Fejervarya moodiei (Taylor, 1920) (Amphibia: Anura: Dicroglossidae) from the state of West Bengal, India
Debayan Gayen, Kaushik Deuti,
Volume 3, Issue 3 (9-2021)
Abstract
Taylor’s Mangrove crab-eating Frog, Fejervarya moodiei (Taylor) which was reported first from the Indian Subcontinent in 2016, is being reported for the first time from West Bengal State, eastern India, based on collections comprising a total of three specimens from South 24 Parganas District from 1983 to 2008, and photographic record of an uncollected specimen in 2019. The species is compared with Fejervarya cancrivora Gravenhorst, with which it is mostly confused.

Study of winter avifauna diversity from a man-made reservoir in the West Bengal, India
Debayan Gayen, Biswajit Mukherjee, Sanchari Sarkar, Bappa Goswami, Sagar Adhurya, Moitreyee Chakrabarty,
Volume 4, Issue 1 (3-2022)
Abstract
The present study was conducted to determine the winter avifauna diversity of the Bakreswar Reservoir, Birbhum district, West Bengal from November 2017 to February 2021 using point count and opportunistic spotting. A total of 174 species of birds belonging to 18 orders, 47 families and 115 genera were noted during the study of which the family Anatidae was the most dominant family with 21 species, followed by the Accipitridae with 19 species, and the Motacillidae and Ardeidae with 10 species each. The Lesser whistling teal Dendrocygna javanica, Red-crested pochard Netta rufina and Bar-headed goose Anser indicus were the most abundant species during the winter months. Four Vulnerable species and five Near Threatened species were also recorded in the study area. Various diversity indices indicated that the species assemblage in 2019–2020 was more diverse than other years. Some species, such as the Common shelduck Tadorna tadorna (Linnaeus, 1758), Swinhoe’s minivet Pericrocotus cantonensis Swinhoe, 1861, Eurasian sparrowhawk Accipiter nisus (Linnaeus, 1758), Pallas’ gull Ichthyaetus ichthyaetus (Pallas, 1773), Black-headed gull Chroicocephalus ridibundus (Linnaeus, 1766), Hen harrier Circus cyaneus (Linnaeus, 1766) and Bonelii’s eagle Aquilla fasciata Vieillot, 1822, are recorded for the first time from this region. Various threats like habitat destruction, habitat degradation and hunting of migratory and threatened birds pose the major problems in the study location.

Diversity and population trends of waterbirds at Lake-2, the Ballavpur Wildlife Sanctuary, West Bengal State, India
Sagar Adhurya, Debayan Gayen, Suvendu Das, Santanu Ray,
Volume 4, Issue 1 (3-2022)
Abstract
The focus of the present study was (i) to develop a complete checklist, (ii) to find the seasonal variation of waterbird diversity, and (iii) to assess the population trends of different waterbirds at Lake-2 of the Ballavpur Wildlife Sanctuary (BWLS), Birbhum District, West Bengal, India. The study was carried out from January 2018 to November 2019. All waterbirds spanning in the freshwater lake were counted with field binoculars and digital cameras. The bird count data were used to calculate different biodiversity indices (such as Shannon-Weiner diversity index, Simpson’s Diversity Index etc.). Further, we assessed the population trends of different waterbirds with the data available from eBird. A total of 32 waterbird species belonging to 27 genera, 9 families and 8 orders were recorded during the present study. Dendrocygna javanica (Horsfield) was found to be the most dominant species throughout the year. Maximum richness and abundance were recorded during the winter months (December to February), whereas the highest species diversity was recorded during the monsoon months (March to June). The present study further establishes that both the richness and abundance of the waterbirds at BWLS have increased as compared to the past data. However, various species of wading waterbirds that were recorded previously were not observed during the present study. Moreover, the population trend analysis revealed a strong decline in the population of Mareca strepera (Linnaeus) and a moderate increase in the population of Ardeola grayii (Sykes). Thus, the present study concludes that BWLS supports high waterbird diversity irrespective of its small area.

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