Goulburn Broken Catchment Management Authoritys Keith Ward said a colony of more than 450 ibis and spoonbills had recently finished nesting in a wetland in the Ramsar-listed site. . . The international listing recognises the forests wetlands as significant for water bird breeding, feeding and refuge. . . Timely deliveries of water for the environment, along with periods of larger natural flooding, resulted in a range of excellent environmental outcomes this year, Mr Ward said. . . One of these was the development of the nesting colony of straw-necked ibis, Australian white ibis and royal spoonbills, a species listed as vulnerable in Victoria. . . This is the first successful nesting event for these species in Barmah National Park for the past four years and will help maintain the sites Ramsar listing. . . Mr Ward said many other species of waterbirds would have bred, but because of their more cryptic hiding nature, were difficult to observe. . . Sound recorders picked up frequent calling activity by these shy species during the nesting season, he said. . . Most significant of these species was the relatively large population of Australasian bittern that are listed as endangered in Victoria. . . With a successful nesting season finished, and thousands of young waterbirds now feeding or migrating to warmer regions, water for the environment will not need to be delivered to the wetlands again until winter. . . The timing, planning and management of the water deliveries involved various government agencies, the Commonwealth and Victorian environmental water holders and Yorta Yorta Nation Aboriginal Corporation. . . Monitoring was undertaken through The Living Murray Initiative, which is a is a joint initiative funded by the NSW, Victorian, South Australian, ACT and federal governments and is co-ordinated by the Murray-Darling Basin Authority. . . All water ordered and used in the forest is debited from specific environmental water accounts and does not affect other water users.