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The greater sandhill crane proper initially suffered most; by 1940, probably fewer than 1,000 birds remained. Populations have since increased greatly again. At nearly 100,000, they are still fewer than the lesser sandhill crane, which, at about 400,000 individuals continent-wide, is the most plentiful extant crane. [26] [40]
The species with the smallest estimated population is the whooping crane, which is conservatively thought to number 50–249 mature individuals, [5] and the one with the largest is the sandhill crane, which has an estimated population of 450,000–550,000 mature individuals.
Even the demoiselle crane and blue crane, which may nest and feed in grasslands (or even arid grasslands or deserts), require wetlands for roosting at night. The Sarus Crane in south Asia is unique in having a significant breeding population using agricultural fields to breed in areas alongside very high density of humans and intensive farming ...
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Sandhill crane Antigone canadensis (Linnaeus, 1758) Five subspecies. A. c. canadensis (Linnaeus, 1758) – northeast Siberia through Alaska and north Canada to Baffin ...