Phylloscopus trochilus trochilus, commonly known as the Willow Warbler, is a small passerine bird belonging to the leaf warbler family, Phylloscopidae. This species is widely known for its melodious song and is a common sight during migration periods in the Comunidad Valenciana.

Identification Features:

• Size: The Willow Warbler is small, with a length of about 11-12.5 cm and a wingspan of 17-22 cm.
• Coloration: It has an olive-green upper body with pale underparts, and a distinct pale yellow or white eyebrow stripe that contrasts with its darker eye.
• Bill: Thin and pointed, suitable for its insectivorous diet.

Habitat and Distribution:

• This bird species is commonly found in woodlands, gardens, and scrub areas, particularly during migration.
• In the Comunidad Valenciana, it is typically observed in the spring and autumn as it migrates between its European breeding grounds and African wintering areas.

Behavior and Diet:

• The Willow Warbler is highly active, often seen flitting through foliage in search of insects and spiders.
• Its sweet, descending song is a characteristic sound of spring, used to maintain territories and attract mates.

Overall, the Willow Warbler is a delightful indicator of seasonal change in the region, admired for both its appearance and song.