Genus Phylloscopus is a group of tiny insect-eating birds commonly known as warblers. They belong to the family Phylloscopidae, which includes over 50 species. Some of the synonyms for the Genus Phylloscopus include leaf warbler, yellow-browed warbler, willow warbler, wood warbler, chiffchaff, and greenish warbler. These birds are known for their melodious songs and acrobatic flights as they catch insects in mid-air. They are found in Eurasia and Africa, breeding in forests and migrating to warmer regions during the winter. The Genus Phylloscopus is a crucial part of the ecosystem, and their decline due to habitat loss and climate change is a cause for concern among bird enthusiasts and conservationists.