Temminck’s seedeater has a very specific diet, feeding almost solely on the seeds of bamboo (especially Guadua species) (7). It is not usually observed unless local bamboo populations are seeding, or ‘masting’; this is when the entire bamboo population releases a large number of seeds at the same time (8). It is thought that Temminck’s seedeater moves around its range, following these masting events (7). However, it is also able to cope with the inevitable occasional lack of bamboo seeds, when it has been reported feeding on alternative seeds, as well as pursuing and capturing insects (6).
Little is known about this bird’s breeding habits (7), although mating is believed to occur in spring (September to November) and is linked to bamboo masting (6). Although only one nest of Temminck’s seedeater has ever been found, at the edge of the forest (2), its nests are likely to be similar to other Sporophila species, which are typically flimsy, cup-shaped structures, generally built in a shrub near the ground. Sporophila species typically lay clutches of two or three eggs (9).