Population trends of the Blue Crane Anthropoides paradiseus were monitored by volunteers participating in Coordinated Avifaunal Roadcounts (CAR) in the Overberg and Swartland agricultural regions of the Western Cape province from 1993 and 1996, respectively, until 2019 in the Overberg and 2017 in the Swartland. The number of Blue Cranes in the Overberg increased from mean density of 47.3 to 204.7 birds 100 km⁻¹ in the summer breeding season, and in the Swartland from 7.5 to 34.2 birds 100 km⁻¹. In both regions, agriculture has resulted in extensive transformation of the original Renosterveld and Fynbos vegetation (Shaw 2003). Results show dramatic population increases in these two regions, following a major decline in populations in the Grassland biome (McCann 2000) where there has also been land transformation. Roadcounts conducted during the breeding season proved more effective in indicating population trends than those during the non-breeding season when birds aggregate in flocks. The survey results show what can be achieved by citizen scientists using a standardised method of monitoring.

分别于1993年和1996年在西开普省奥弗贝格和Swartland农业地区参加协调鸟类道路计数（CAR）的志愿者监测了蓝鹤类人猿天堂的种群趋势，直到2019年在Swartland的奥弗贝格和2017年。夏季繁殖季节，奥弗贝格的蓝鹤数量从平均密度47.3鸟增加到204.7鸟100 km ^-1，而在Swartland ，蓝色鹤的数量从7.5鸟增加到34.2鸟100 km ^-1。在这两个地区，农业都使原始的雷诺斯特韦尔德和费恩博斯植被发生了广泛的转变（Shaw 2003）。结果表明，继草地生物群落的人口大量减少之后，这两个地区的人口急剧增加（McCann 2000），那里的土地也发生了转变。事实证明，在繁殖季节进行的盘点比在鸟类繁殖成群的非繁殖季节进行的盘点更为有效。调查结果表明，公民科学家可以使用标准化的监测方法来实现。