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Table 2 Numbers of Black-necked Cranes in different habitats in the Yarlung Tsangpo River basin, Tibet

From: Population dynamics and habitat use of the Black-necked Crane (Grus nigricollis) in the Yarlung Tsangpo River basin, Tibet, China

Types Early wintering period Middle wintering period
Number of individuals Number of flocks Average flock size Number of individuals Number of flocks Average flock size
Pasture 247 (4.2%) 13 (2.4%) 19.0 ± 35.4 519 (7.5%) 40 (8.2%) 12.9 ± 24.1
Winter wheat land 414 (6.9%) 24 (4.3%) 17.3 ± 25.1 49 (0.7%) 14 (2.8%) 3.5 ± 3.6
Plowed land 2025 (34.2%) 274 (44.7%) 7.4 ± 17.7 771 (11.2%) 89 (18.3%) 9.3 ± 24.4
River 581 (9.8%) 35 (6.3%) 16.6 ± 30.6 1212 (17.6%) 84 (17.3%) 14.3 ± 19.7
Crop stubble land 2230 (37.6%) 201 (36.3%) 11.1 ± 22.3 4136 (60.2%) 245 (50.4%) 16.9 ± 36.6
Marsh 429 (7.2%) 19 (3.4%) 22.6 ± 39.9 189 (2.7%) 14 (2.9%) 13.5 ± 24.2
  1. The numbers in parentheses indicate the percentages