The critically endangered Indian Courser (Cursorius coromandelicus) is a rare resident bird species in Sri Lanka. This bird species is restricted to the northern avifaunal region of Sri Lanka, and even there it has been recorded from only a few locations. Thus, it is identified as one of the rarest birds in Sri Lanka. A 1-year study was conducted to investigate Indian Courser population and their distribution within the Delft Island from 5th of January to 20^th of December 2020. Ten (10) randomly selected points were investigated in this study. Of the 10 sampling points, the Indian Courser was observed within three (03) sampling points year around while several sightings were recorded in points 8, and 9 during 3 months of the year. Their abundance significantly varied among sampling locations (one-way ANOVA, F = 15.04, p < .05). The maximum number of individuals recorded was 18 ± 4.64 in December and the minimum number was 4 ± 4.64 during the non-migrant season. Although most of the area in the island is covered with dry grasslands, their distribution in Delft is largely confined to a few grassland patches where human activities are minimum. Hunting, egg collection, and trampling of their nest by the Delft ponies (feral horses) can be identified as the main threats of this species. It is of utmost importance to immediately implement holistic conservation measures to save this critically endangered bird as Delft is the only known location where a viable resident population of Indian Courser is found.

极度濒危的印度骏马（Cursorius coromandelicus）是斯里兰卡的稀有鸟类。这种鸟类仅限于斯里兰卡北部的鸟类区，即使在那里也只有少数几个地方有记录。因此，它被确定为斯里兰卡最稀有的鸟类之一。为期1年的研究进行调查的印度人口骏马和他们的代尔夫特岛距离一月5日至20分发^日2020 年 12 月。本研究调查了十 (10) 个随机选择的点。在 10 个采样点中，印度骏马在一年中的三 (03) 个采样点内被观察到，而在一年中的 3 个月内，在第 8 和第 9 点记录了几次目击事件。它们的丰度在采样位置之间存在显着差异（单向方差分析，F = 15.04，p< .05）。12 月记录的最大个体数为 18 ± 4.64，非迁徙季节最小数量为 4 ± 4.64。尽管岛上的大部分地区都覆盖着干燥的草原，但它们在代尔夫特的分布主要限于人类活动最少的几个草原斑块。代尔夫特小马（野马）的狩猎、收集鸡蛋和践踏它们的巢穴可以被确定为该物种的主要威胁。立即实施整体保护措施以拯救这种极度濒危的鸟类至关重要，因为代尔夫特是唯一已知的印度骏马栖息地。