The Avifaunal diversity study of Pakhibitan, Ecopark is published by Nature Mates Nature Club under WBHIDCO Pakhibitan Project in Pakhibitan, Ecopark, Newtown, Kolkata, West Bengal, India. This sampling event was performed in a selected point located in the marshlands covered with elephant grass (Typha sp.) of Pakhibitan surrounded by medium-sized trees and bushes. Marshland of Pakhibitan is mostly covered with elephant grass (Typha sp.) surrounded by a medium-sized trees and bushes. In the summer (April-May), the maximum temperature of the area reaches around 41°C. During the winter (December-February), the temperature drops to 9°C while the average rainfall is 1836.5 mm per year. The soil type is alluvial because it is located in the Indo-Gangetic plain. This dataset includes all the birds recorded in a span of three months from July to September 2024. All the species are identified up to the species level. A total of 92 species of birds were recorded belonging to 16 orders and 41 families. Along with birds diversity we also mentioned temperature, humidity and wind speed in the dataset. This dataset also includes the life stage, activity, and behavior of the observed birds.