The study population of the Aquatic Warbler showed a low proportion of
unfertile eggs (8.6 %), very low nest losses (17.9 %), including loss
es from predation (11.1 %), and high average production of fledglings
per nest (3.25 +/-1.9) compared with populations of its congeners and
other related species. As adult mortality also seems low, it is conclu
ded that the main threat to this endangered species in the study area
may be change of habitat.