How to identify
This sparrow sized bird (weigh: 12 g, body length: 13 cm) is very similar to its commonly found cousin – the sedge warbler. The aquatic warbler differs from the latter in having paler feathers and a pale yellow pronounced strip on its head running from its beak to the top of the head. Similar strips are present on the back in the area of shoulders. The plumage of both sexes is practically identical. The fully-fledged juvenile birds are similar to the adults but they do not have spots on their sides.
It lives in a very specific habitat and can only be found there.