Chiffchaff
| International Name: | Chiffchaff | Scientific Name: | Phylloscopus collybita |
| Length: | 10-11 cm (4") | Wing Span: | 15-21 cm (6-8") |
| Weight: | 6-10 g ( ¼ - ½ oz) | Breeding Pairs: | 640 000 |
| Present: | Summer | Status: |  Green List |
Description
The Chiffchaff is a tiny warbler about the size of a Blue Tit. Chiffchaffs are summer visitors to Britain, and are among the first migrant songbirds to arrive in the spring. They winter in the Mediterranean and north Africa.
In spring and summer, they have brownish-green upper parts and buff underparts. There is a dark eye stripe through the eye, a pale stripe above the eye (supercilium) and a thin pale eye ring.
The Chiffchaff is practically indistinguishable from the Willow Warbler, though it is less yellow, has shorter supercilia and often has darker legs; remember the phrase: "the riff-raff have dirty legs". They also tend to be found towards the tops of trees and bushes, in woodland areas, whereas Willow Warblers are more often lower down (and in more open, scrub areas), and seem more nervous - constantly flicking their tail downwards.
Voice
The best way of distinguishing the Chiffchaff from the Willow Warbler is by their song. Their calls are almost identical, but in the autumn they rarely sing so the call is often the easiest way of finding the warbler.
The Chiffchaff's song sounds like its name "chiff chaff", while the Willow Warbler's song is a melodic rippling phrase that rises quickly before slowly dying away.
Feeding
Chiffchaffs feed on insects, which they find by foraging in tree canopies and among bushes. Indeed, Phylloscopus means leaf explorer and Chiffchaffs search the undersides of leaves where aphids congregate and feed on the tree's sugary sap.
Breeding
The female Chiffchaff does the nest building. The domed nest is built on or very close to the ground in tall grass, bushes, or wall creeping plants. Dead vegetation (stems and leaves) are used for the construction, and a thick feather lining.
The duties of incubating the eggs are performed by the female. The eggs are about 15 mm by 12 mm, smooth and glossy, white with purplish or black markings. The young birds are fed by the female only.
| Breeding Starts | Number of Clutches | Number of Eggs | Incubation (days) | Fledge (days) |
| April-May | 1-2 | 4-9 | 13-14 | 12-15 |
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