a birdwatcher (= a person who watches birds in their natural environment and identifies different species as a hobby) 观鸟者（在自然环境中观察并鉴定鸟类，作为一种爱好） The data was collected by thousands of birders. 该数据由成千上万的观鸟者收集。 The island is a popular spot for birders. 该岛是观鸟的热门地点。