The yellow-breasted apalis is a common warbler that can be seen in many habitats including forest edge, thickets and gardens. They often feed in the canopy on insects, spiders and caterpillars, also aloe nectar. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, dry savanna, and moist savanna.
A rather active little bird, occurring in pairs or small groups. They are often seen working their way around a tree or shrub, flitting in and out, balancing and hanging in all sorts of positions.