Common chiffchaff one of the first avian signs that spring has returned. Its call is a "hweet", less disyllabic than the "hooeet" of the willow warbler or "hu-it" of the western Bonelli's warbler. The song differs from that of the Iberian chiffchaff, which has a shorter . However, mixed singers occur in the hybridisation zone and elsewhere, and can be difficult to allocate to species. When not singing, the common chiffchaff can be difficult to distinguish from other leaf warblers with greenish upperparts and whitish underparts, particularly the willow warbler. However, that species has a longer primary projection, a sleeker, brighter appearance
Handbook to the Birds of Australia Handbook to the Birds of Australia The Handbook to the Birds of Australia is a two-volume work published in London in 1865 by the author John Gould. It was published in octavo format (250 x 170 mm), containing some 1290 pages, bound in green cloth with gilt lyrebirds on the front covers and with decorated gilt spines. The two volumes are separately paginated and include no illustrations It is essentially a revision and update of the text originally published with Gould’s monumental illustrated folio The Birds of Australia, which was published in seven volumes between 1840 and 1848. The author