Priorities identification of habitat restoration for migratory birds under the increased water level during the middle of dry season: A case study of Poyang Lake and Dongting Lake wetlands, China

•Priorities identification of habitat restoration for migratory birds in wetlands.•Different classification methods are compared to identify priorities.•Poyang Lake: the geometric interval is the best method for priority identification.•Dongting Lake: the quantile is the best method for priority identification.