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
For the Birds (film) top, which is accompanied by the squeaks the birds made to communicate with each other. A similar appearance occurred in "Inside Out", while Riley and her family are driving to San Francisco at the beginning of the movie. "For the Birds" is one of two short films on the DVD and VHS release of "Monsters, Inc." The film was also released as part of "Pixar Short Films Collection, Volume 1" in 2007. For the Birds (film) For the Birds is a 2000 computer animated short film produced by Pixar and directed by Ralph Eggleston. It won the Academy Award for