Leaf warblers are small insectivorous birds belonging mainly to the genus Phylloscopus Friedrich Boie in 1826. The genus name Phylloscopus is from Ancient Greek phullon , "leaf", and skopos , "seeker" (from skopeo , "to watch").
Leaf warblers were formerly included in the Old World warbler family but are now considered to belong to the Phylloscopidae, a family created in 2006. The genus is closely related to Seicercus
Most are greenish or brownish above and off-white or yellowish below. Compared to some other "warblers", their songs are very simple.
Species breeding in temperate regions are usually strongly migratory.
The species traditionally placed in Phylloscopus are:
Red-faced woodland warbler , Phylloscopus laetus Laura's woodland warbler , Phylloscopus laurae Yellow-throated woodland warbler , Phylloscopus ruficapilla Uganda woodland warbler , Phylloscopus budongoensis Brown woodland warbler , Phylloscopus umbrovirens Black-capped woodland warbler , Phylloscopus herberti Willow warbler, Phylloscopus trochilus Canary Islands chiffchaff , Phylloscopus canariensis Eastern Canary Islands chiffchaff , Phylloscopus canariensis exsul (extinct: 1986?)Western Canary Islands chiffchaff , Phylloscopus canariensis canariensis Common chiffchaff, Phylloscopus collybita Siberian chiffchaff, Phylloscopus (collybita) tristis Iberian chiffchaff , Phylloscopus brehmii Mountain chiffchaff , Phylloscopus sindianus Plain leaf warbler , Phylloscopus neglectus Western Bonelli's warbler , Phylloscopus bonelli Eastern Bonelli's warbler , Phylloscopus orientalis Wood warbler , Phylloscopus sibilatrix Dusky warbler , Phylloscopus fuscatus Smoky warbler , Phylloscopus fuligiventer Tickell's leaf warbler , Phylloscopus affinis Alpine leaf warbler, Phylloscopus occisinensis Buff-throated warbler , Phylloscopus subaffinis Sulphur-bellied warbler , Phylloscopus griseolus Yellow-streaked warbler , Phylloscopus armandii Radde's warbler , Phylloscopus schwarzi Buff-barred warbler , Phylloscopus pulcher Ashy-throated warbler , Phylloscopus maculipennis Pallas's leaf warbler , Phylloscopus proregulus Lemon-rumped warbler , Phylloscopus chloronotus Simla leaf warbler, Phylloscopus (chloronotus) simlaensis Gansu leaf warbler , Phylloscopus kansuensis Chinese leaf warbler , Phylloscopus yunnanensis – P. sichuanensis is a junior synonymBrooks's leaf warbler , Phylloscopus subviridis Yellow-browed warbler , Phylloscopus inornatus Hume's leaf warbler , Phylloscopus humei – formerly in P. inornatus Mandell's leaf warbler, Phylloscopus (humei) mandelli Arctic warbler , Phylloscopus borealis Kamchatka leaf warbler , Phylloscopus examinandus Japanese leaf warbler , Phylloscopus xanthodryas Greenish warbler, Phylloscopus trochiloides Dull-green warbler, Phylloscopus (trochiloides) obscuratus Western greenish warbler, Phylloscopus (trochiloides) viridanus Two-barred warbler , Phylloscopus plumbeitarsus Green warbler , Phylloscopus nitidus Pale-legged leaf warbler , Phylloscopus tenellipes Sakhalin leaf warbler , Phylloscopus borealoides Large-billed leaf warbler , Phylloscopus magnirostris Tytler's leaf warbler , Phylloscopus tytleri Western crowned warbler , Phylloscopus occipitalis Eastern crowned warbler , Phylloscopus coronatus Ijima's leaf warbler , Phylloscopus ijimae Blyth's leaf warbler , Phylloscopus reguloides Claudia's leaf warbler , Phylloscopus claudiae Hartert's leaf warbler , Phylloscopus goodsoni Emei leaf warbler , Phylloscopus emeiensis Davison's leaf warbler , Phylloscopus davisoni Kloss's leaf warbler , Phylloscopus ogilviegranti Hainan leaf warbler , Phylloscopus hainanus Sichuan leaf warbler , Phylloscopus forresti Yellow-vented warbler , Phylloscopus cantator Limestone leaf warbler , Phylloscopus calciatilis Sulphur-breasted warbler , Phylloscopus ricketti Lemon-throated leaf warbler , Phylloscopus cebuensis Mountain leaf warbler , Phylloscopus trivirgatus Sulawesi leaf warbler , Phylloscopus sarasinorum Timor leaf warbler , Phylloscopus presbytes Island leaf warbler , Phylloscopus maforensis Philippine leaf warbler , Phylloscopus olivaceus Makira leaf warbler , Phylloscopus makirensis Kolombangara leaf warbler , Phylloscopus amoenus Grey-hooded warbler , Phylloscopus xanthoschistos 
