What is the description of the Willow Warbler contact call contrasted with the Chiffchaff's?
Answer
Short, disyllabic sound described as "hoo-eet"
The vocal repertoire provides a much more immediate means of identifying a Willow Warbler compared to visual inspection, especially when the bird is obscured by foliage. The primary song is a flowing, descending whistle used by males to attract mates. However, the contact call, used for simpler communication between individuals, is distinctly different. It is characterized as a short, disyllabic sound, frequently transcribed phonetically as "hoo-eet". This contrasts sharply with the Chiffchaff's characteristic calls, which are often described as monosyllabic like "hweet" or the repetitive, emphasized call that gives the Chiffchaff its own name, "chiff-chaff-chiff-chaff".
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