Kloss's Leaf Warbler Phylloscopus ogilviegranti     photos Sid Francis

Big warbler with crown-stripe, chunky bill and wing bars, almost identical to Claudia's. In the field vocalizations can distinguishing the two species , kloss's less complicated with a single, short and repeated song phrase, Also a wing lifter but display comprises of both wings raised together, rather than claudia's single, alternate style. It's generally found at lower altitudes than claudia's but we have found where breeding zones coincide. Seems adaptive to using plantation type habitat - at least that type of habitat where some native growth can be found.

Similar species - have already discused similarities/differences with claudia's but also have to consider Eastern Crowned, which is another crown stripe bird that can be found in lower forest. However , breeding eastern crowned are normally distributed in areas of N Sichuan, and is not a warbler that features on many Sichuan lists. Main differences between Eastern-crowned and Kloss's are a very different song, Eastern Crowned single, indistinct wingbar and even chunkier bill. Remember even with photos - you need vocals to separate from Claudia's in overlap areas.

Vocalizations - the key to separating from claudia's - we find the main difference is that Kloss's song is a repetition of near identical high pitched, short phrases, each just over a second long, maide up of very quickly sung notes. Unlike claudia's song, we dont hear the range of variation and trill like phrases. Call is similar to claudia's. 

Habitat - lower forest, we find it using a narrow altitude band starting just above the1,000m mark going up to around 1,500m - a variety of forest types including those dominated by plantation. 

Song here     Sid Francis iNaturalist

Call here - xeno-canto     Mike Nelson, XC267136. Accessible at www.xeno-canto.org/267136