The green hermit (Phaethornis guy) is a large hummingbird that is a resident breeder from southern Central America (Costa Rica and Panama) south to northern South America (north-eastern Venezuela and Trinidad, and the northern Andes of eastern Peru) It is 13.5 cm (5.3 in) long and weighs 6.3 g (0.22 oz).

Habitat there usually has a canopy height of around 25 m (82 ft) and is dominated by trees such as Elaeagia (Rubiaceae) or palms;[3] there is usually plentiful undergrowth and/or epiphytes and hemiepiphytes (e.g.

At Monteverde (Costa Rica), preferred foodplants include yellow jacobinia (Justicia umbrosa) and Razisea spicata (Acanthaceae), Pitcairnia brittoniana (Bromeliaceae), spiral ginger (Costus barbatus, Costaceae), Drymonia conchocalyx and D. rubra (Gesneriaceae), Heliconia tortuosa (Heliconiaceae), and Malvaviscus palmanus (Malvaceae).

Less commonly visited flowers were mostly Gesneriaceae,[5] Heliconiaceae (such as Heliconia bihai),[6] Acanthaceae (such as Pachystachys coccinea)[6] and Zingiberales,[7] but also certain Bromeliaceae[8] (such as Tillandsia fasciculata)[6] Campanulaceae[9] (such as Centropogon surinamensis),[6] Ericaceae[10] and Rubiaceae.

In the Colombian Cordillera Oriental, active leks were observed between September and November, but neither in August nor in December, indicating a distinct breeding season.