Great Reed Warbler
That's the creaking in the reeds! It's amazing how the voice of a bird barely the size of a blackbird can sound so creaky. The advantage of this voice is that it can be heard well even in the reeds that rustle in the wind. Like all its relatives, the Great Reed Warbler artfully attaches its nest to several reed stalks; in keeping with its size, it needs strong old reeds for this.
The Great Reed Warbler is quite common in the Mediterranean region and in continental Europe, but is rare in the west. It needs larger insects as food, which is why it only returns late from its winter quarters in tropical Africa. Its smaller cousins, the Marsh Warblers, Reed Warblers and Marsh Warblers, make do with the aphids that are common in the reeds at the beginning of the breeding season.