Is about 10 to 11. 5 cm. It is a dark green hummingbird. The male has a white flaky necklace, breast and underparts are white socks, contrasting with the green side and the choker. The tail is black. The female has the throat with white tail with dark gray sides. They are agile in the air, able to hover and fly backwards. Put 2 to 2 egg whites. The nest is cup-shaped, usually located in a horizontal twig. The Pacific slope from Nayarit to the south. The lowlands of the Gulf from Veracruz to the south, excluding the Yucatan Peninsula. .