Pequin (or Piquin) pepper (pronunciation: pee/puh-KEEN) is a hot chile pepper, also known as "bird pepper", that is commonly used as a spice.
Pequin has a compact habit growing typically 0.3 - 0.6 meters tall, with bright green, ovate leaves and small fruits that rarely exceed 2 cm in length. Like most chiles, fruits start out green, ripening to brilliant red at maturity. Pequin peppers are very hot, often 7-8 times hotter than jalapeños on the Scoville scale (30,000-60,000 units). Flavor is described as citrusy, smoky, and nutty.
Other common names (and possible misnomers) of this plant are pinhead pepper, chile petin, chile pequin, piquin, chiltepin, and chile mosquito.