Artificial intelligent assistant

Identification of a probable sylviidae One summer (August) I was in Bulgaria (Dobrich province) and in the middle of the city I take picture of this bird: ![sylviidae]( ![sylviidae]( ![sylviidae]( He was making a sound like "Tchek-tchek" like the sound of a `Eastern Olivaceous Warbler` (lat. `Iduna Pallida`) but the greenish color make me think it is more a `Icterine Warbler` (lat. `Hippolais icterina`). I found a song similar to the bird I saw on this page (second record). It could also be a `Common Chiffchaff` (lat. `Phylloscopus collybita`) or a `Willow Warbler` (lat. `Phylloscopus trochilus`) as they are very common but the length of the tail make me feel it more one of the above (or another one) and the sound does not seem to fit. Anyone can help on identification of this bird?

The first picture is an Icterine warbler. Because of the yellowish plumage (never in the eastern olivaceous) and the with fringes of tertiary characteristic of the species and never present in the genus Phylloscopus. Also the color of the leg, greish-bluish is quite specific of the Icterine.

![enter image description here](

The second and third picture are of a Willow warbler ( _Phylloscopus trochilus_ ). The legs are pale compared to a chiffchaff and the primary projection (the length of the primaries that pass the tertiary) is extremely long and very typical of the willow warbler. You can see the difference in the image below. Here a useful webpage

![enter image description here](

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