A recent survey identified a colony of Pipistrellus tenuis (n = 5) in Kanyakuchi Pahar village (26°00’32.8″N 90°53’29.0″E), a rural remote site situated at Goalpara district of Assam. This species, commonly known as the Least Pipistrelle, was previously reported by Hinton and Lindsay (1926), Sinha (1999), Ghosh (2008), Saikia et al. (2011) and Boro et al. (2018) from different parts of Assam. The Goalpara district of western Assam is encircled by the foothills of Meghalaya to the South and the Brahmaputra River to the North possesses a variety of flora and fauna due to the dense foliage of the high forest canopy. The climatic condition of the region along with its topography favours roosting of bat population. The distribution of the bat species P. tenuis in the surveyed area has not been previously recorded. For the purpose of taxonomic identification, morphometric parameters (external and cranio-dental measurements) were compared to standard literature by Bates and Harrison (1997). Captured bat specimens (n=3) were examined at the ZSI (Zoological Survey of India), NERC-Shillong, Meghalaya. The recorded mean body weight of captured specimens was 2.61g ± 0.160 (S.D) and the mean forearm length (FA) was 27.39mm ± 0.165 (S.D). This manuscript validates sightings of this bat species at the study location, compares its morphometric and cranio-dental traits to standard literature (Bates and Harrison, 1997) for identification, discusses its distribution as well as its ecological importance. Published by the Journal of Biodiversity and Environmental Sciences | JBES, {"references":["Acharya PR, Adhikari H. 2010. Bats of Nepal : A field guide, small mammals' conservation and research foundation, WWF-Nepal,116. https://www.researchgate.net/publication/303230201_Bats_of_N","Alfred JRB, Ramakrishna, Pradhan MS. 2006. Validation of Threatened Mammals of India, Published by the Director, Zool. Survey of India, Kolkata 1-568.","Ali A. 2022. Species diversity of bats (Mammalia: Chiroptera) in Assam, Northeast India. Journal of Wildlife and Biodiversity 6(3), 115–125. DOI: https://doi.org/10.5281/zenodo.6603976","Animal diversity web (ADW). 2022. Pipistrillus tenuis, Available online: [Accessed on June 2022]. https://animaldiversity.org/accounts/Pipistrel","Bat Conservation International (BCI). 2022. An Unlikely Hero with Global Impact, Available online: Accessed on 25 March 2022. https://www.batcon.org /about-bats/bats-101/","Bates PJJ, Harrison DL. 1997. Bats of the Indian Subcontinent, Harrison Zoological Museum Publications, Sevenoaks, UK 1- 258.","Boro A, Saikia PK, Saikia U. 2015. A preliminary assessment of bat diversity and people's attitude towards their conservation in Basksa district, Western Assam. Keanean Joumal of Science 4, 3-8. https://www.researchgate.net/publication/319990629","Boro A, Saikia PK, Saikia U. 2018. New records of bats (Mammalia: Chiroptera) from Assam, northeastern India with a distribution list of the bat fauna of the state, Journal of Threatened Taxa 10(5), 11606-11612.","Brosset A. 1962. The bats of central and western India – Part I. Journal of the Bombay Natural History Society 59, 1-57.","Brosset A. 1963. The bats of central and western India. Part. IV. Journal of the Bombay Natural History Society 60, 337- 355.","Census of India. 2011. District Census Handbook Goalpara, Village and Town Directory, Assam. Series-19, Part XII-A, 63-403.","Climate Goalpara (India). 2022. Available online:https://en.climatedata.org/asia/india/assam/goalpara-24654/, (Accessed on 22 April 2022).","Corbet GB, Hill JE. 1992. The Mammals of the Indomalayan Region. British Museum (Natural History) / Oxford University Press, London 488.","Csorba G, Ujheli P, Thomas N. 2003. Horseshoe Bats of the World (Chioptera: Rhinolophidae) Alana Books 192.","Elangovan V, Mathur V, Kumar M, Satyapriya Y. 2018. Diversity and Conservation of Chiropteran Fauna, In book: Indian Hotspots, 57-87. DOI: 10.1007/978-981-10-6605-4_3","Francis CG, Rosell-Ambal B, Tabaranza L, Lumsden L, Heaney J, Gonzalez L. 2010. Pipistrellus tenuis (On-line). IUCN Red List of Threatened Species, [Accessed April 20, 2022].","Ghosh MK. 2005. Catalogue of Chiroptera in the collection of the Zoological Survey of India, Part I: Megachiroptera. Rec. Zool. Surv. India, Occ. Paper No. 232, 1-143.","Ghosh MK. 2008. Catalogue of Chiroptera in the collection of the Zoological Survey of India, Part II: Microchiroptera. Rec. Zool. Survey India, Occ. Paper No. 281, 1-339.","Hamidullah, Arshad J, Rasheed B, Abidullah, Khan MI. 2019. Morphological Differentiation in Some Pipistrellus sp. (Chiroptera) Captured from Bajaur Agency, Pakistan, Pakistan Journal of Zoology 51(2), 399-799, DOI: http://dx.doi.org/10.17582 /journal.pjz/2019.51.2.689.695","Javid A, Hassanmm, Hussain SM, Iqbal KJ. 2011. The recent record of the Asiatic lesser yellow house bat (Scotophilus kuhlii) from Punjab, Pakistan. Mammalia 78, 133-137. https://doi.org/10.1515/ mammalia-2013-0012"]}