Philip D. RoundStephen J. RumseyMahidol UniversityThe Wetland Trust2018-07-242018-07-242003-01-01Ringing and Migration. Vol.21, No.4 (2003), 215-22121598355030786982-s2.0-0347300676https://repository.li.mahidol.ac.th/handle/20.500.14594/20657Manchurian Reed Warblers Acrocephalus tangorum wintering at Khao Sam Roi Yot, Thailand, were largely restricted to mature Phragmites reeds. The mean wing length (± sd) of 105 Manchurian Reed Warblers was 54.5 ± 1.41 mm. There was no evidence of differences in body weight in spring, autumn or winter. Both adults and first-winter birds underwent a complete moult soon after arrival in their winter quarters. Primary moult duration was estimated to be 59 days. Moult of secondaries was suspended in approximately one-third to one-fifth of birds, the few retained, old, unmoulted feathers usually being replaced later in the winter. No further moult was usually detected prior to northward spring migration. © 2003 British Trust for Ornithology.Mahidol UniversityAgricultural and Biological SciencesArticleSCOPUS10.1080/03078698.2003.9674296