From the introduction:
"The Asian Waterfowl Census was established in 1987 as a consequence of alarming reports on the destruction and degradation of wetlands in Asia, and the subsequent reported decline of waterfowl populations [...] In 1990 the fourth consecutive coordinated Asian Waterfowl Census was carried out, as a joint project of IWRB and AWB. This report summarizes its findings in the 28 participating Asian countries during the mid-winter (generally January) of 1989/90. The number of participating countries was once again a record, and data were received from over 1476 wetlands counted by over 671 participants. Altogether, 6.6 million waterfowl of over 200 species were recorded."
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