The Willow Warbler (Phylloscopus trochilus) is a small, lime green and yellow bird commonly observed in Qatar during its spring and autumn migrations. It is a passage migrant, arriving in variable numbers each year. Often inconspicuous, it flits through the foliage of trees and bushes and occasionally forages on the ground among tufts of grass and plants. It feeds on seeds, fruits, and insects. Habitat & Behavior The Willow Warbler is primarily found in areas with trees and shrubs, though it also searches for food on the ground. It is typically quiet during its time in Qatar, unlike the more vocal Common Chiffchaff. The arrival of Willow Warblers in spring often coincides with the departure of Common Chiffchaffs. Appearance & Physical Characteristics Plumage: Lime green and yellow overall, with olive-green backs and wings. Pale underparts with a faint yellowish tint on the breast. A pale yellow supercilium (stripe above the eye). Legs: Orangey-brown legs, which distinguish it from the Common Chiffchaff, whose legs are black. Distinctive Features: Lacks wing bars, setting it apart from some other warblers. Displays slightly more vivid coloration compared to the Chiffchaff. Call The Willow Warbler produces a gentle, descending series of melodious notes. Its song is often described as soft, harmonious, and cascading, resembling a flowing waterfall. A typical melody might sound like: "tsoo-tsoo-tsoo, tee-tee-tee, chee-chee-chee." However, in Qatar, the Willow Warbler is usually silent during migration, and its song is rarely heard. Size and Comparison This bird is small in size, closely resembling the Common Chiffchaff. However, it can be distinguished by its brighter plumage, pale pink or orangey-brown legs, and absence of wing bars. Seasonal Presence The Willow Warbler is seen in Qatar during its migratory periods in spring (March to May) and autumn (September to October). It frequently appears in variable numbers each year.