Yellow-bellied Tit (Periparus venustulus) — identification, habitat & look-alikes

The Yellow-bellied Tit is a tiny black-and-yellow tit found only in China, so you won't see it in the United States. In winter, flocks sometimes wander far from home: it shows up irregularly in Hong Kong, and since 2005 it has been turning up more and more often in South Korea.

Appearance

Appearance: A compact little tit, about 4–4.3 in (10–11 cm) long, with a big head, short tail, and sharp bill. Males have a black head, back, and throat, a bright white cheek patch, and yellow underparts. Females have the same pattern but in dark olive-green tones, with a white throat.
Voice: Its most common call is a high, slightly metallic three-note "chee-chee-chee."

Where it lives

Typical habitats: Forests
Parks and city green spaces
Range: Endemic to China, from Hebei in the north and Gansu in the west to Yunnan in the south and Anhui in the east. In some winters, flocks wander to the southeast coast, reaching Hong Kong.
Seasonal presence: Mostly resident, but some winters bring , when flocks move well outside the usual range.
Preferred conditions: Lives in temperate and subtropical forests below about 6,600 ft (2,000 m), especially mature woods with large trees, and also in urban green spaces.

Behavior

Social life: Males defend territories fiercely but tend to tolerate their established neighbors, a pattern researchers call the "dear enemy" effect. During winter irruptions in Hong Kong, birds usually travel in flocks of 20–30 that may stay in one area for weeks.