Bird's eye chili. For other uses, including peppers with similar names, see Birdseye. Bird's eye chili, bird eye chili, bird's chili or Thai chili is a chili pepper, a cultivar from the species Capsicum annuum, commonly found in Southeast Asia. It is often confused with a similar-looking chili derived from the species Capsicum frutescens, the cultivar siling labuyo.