Phylloscopus collybita
Silhouette: Sharp Photography, sharpphotography.co.uk · PhyloPic
In 3 days ~90% in a week >90%
The common chiffchaff (Phylloscopus collybita), or simply the chiffchaff, is a common and widespread leaf warbler which breeds in open woodlands throughout northern and temperate Europe and the Palearctic. It is a migratory passerine which winters in southern and western Europe, southern Asia and north Africa. Greenish-brown above and off-white below, it is named onomatopoeically for its simple chiff-chaff song. It has a number of subspecies, some of which are now treated as full species. The female builds a domed nest on or near the ground, and assumes most of the responsibility for brooding and feeding the chicks, whilst the male has little involvement in nesting, but defends his territory against rivals, and attacks potential predators.
A small insectivorous bird, it is subject to predation by mammals, such as cats and mustelids, and birds, particularly hawks of the genus Accipiter. Its large range and population mean that its status is secure, although one subspecies is probably extinct.
The British naturalist Gilbert White was one of the first people to separate the similar-looking common chiffchaff, willow warbler and wood warbler by their songs, as detailed in... Wikipedia →
Likely
About 60% of wildlife watchers report a Common Chiffchaff sighting in Triglav National Park on a given day, based on 425 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 105 birds we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
June and August
In those months about 70% of wildlife watchers report a Common Chiffchaff in Triglav National Park on a given day, against about 30% in January–February and November, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Common Chiffchaff sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 38
Of the 38 parks where we can rate Common Chiffchaff sightings, Triglav National Park ranks 3rd at about 60%. The best odds are in Tatra National Park (Slovakia, about 70%) and Białowieża National Park (Poland, about 70%). All parks ranked.
GBIF citizen-science records
It is estimated from how often the Common Chiffchaff is recorded against all the birds logged in Triglav National Park (425 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
