Mexican Woodnymph

Mexican woodnymphs are small birds, generally 9–10 centimetres (3.5–3.9 in) long. Females weigh around 3.5 grams (0.12 oz) and males weigh from 3.5 to 4.2 grams (0.12 to 0.15 oz). Males have a straight black bill, mostly green body, a dull green chest, a blue-black forked tail, and an indigo crown. Females are similar, mostly green with darker green tail and wings, a light gray chest. They lack the characteristic indigo crown, instead have a white spot behind their eyes and green disks on the sides of their chest. One known vocalization consists of an irregular series of 2–4 quick notes. Their call has been described as a "liquid rattle".

Mexican woodnymphs live exclusively in the northern mountains of western Mexico, with habitat in the states of Nayarit, Jalisco and Colima. They are not migratory and spend the whole year in their small range. They are the northernmost species of their genus. Although there is little known of the specific habitat requirements for Mexican woodnymphs, we are aware that they reside in humid forests, canyons and foothills at elevations of 250–1,200 metres (820–3,940 ft). They can be found at the forest and open woodland, and may inhabit some coffee plantations.

Mexican woodnymphs are nectivorous and insectivorous. They feed primarily on flower nectar from a variety of flowering plants, including: Rubiaceae, Zingiberaceae and epiphytes. They also eat arthropods by catching them in the air or eating them off vegetation.