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Id | 5790 | ||||||||||||
Family | Leaf Warblers ~ Løvsangere ~ Mosquiteros (Phylloscopidae) | ||||||||||||
Species |
Common Chiffchaff (Phylloscopus collybita) Gransanger ~ Mosquitero Común ~ Gransångare |
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Subspecies | abietinus? | ||||||||||||
Locality |
Kalvebod Fælled, Denmark
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Date | 2024-04-16 | ||||||||||||
Sex, Age, Comment |
Thicket between Ottehøjevej and Ellevehøjvej-sporet. Originally suspected to be a tristis. Both recordings of this bird. Bird 2. All observations of tristis without sound documentation are by default invalidated by the DOFbase Police. So I went out today again to get recordings. This bird and the one near Hejresøen were still in place. To the un-trained ear, like mine, I had the sound to be spot on for tristis, but when studying the matter closer it becomes clear that the call of tristis is more mellow and falling more at the end. Also the frequency interval for tristis is lower, mostly in the range of 4.5 to 5 Khz, whereas all of these abienitus calls range from 3 to between 5+ Khz. The behavior of these birds seem to be quite different from our birds, at least when it comes to vocalization. All the birds I have been following have been very persistent calling eagerly for long spells at a time, and without interacting with other phylloscopus warblers. They all seemed to have found their own little spot where they forage in between many other phylloscopus warblers. I suspect them to be waiting for better weather before migrating further north - it's been cold and wet for some days now, making it understandable why a small passerine prefers to stay put where there is good shelter and food. Notice how the visual presentation of the call changes shape drastically when altering the time scale along the x-axis. |
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Same bird | 173 | ||||||||||||
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