Volcán de Irazú, Costa Rica.
Classification unstable; commonly treated as conspecific with L. cinereicauda and L. castaneoventris, but, while females of all taxa are very similar, combination of highly distinctive male plumages and parapatric distributions, along with observations that where white-throated and purple-throated forms occur on the same slopes they tend to segregate altitudinally (white-throated higher), suggests species status more appropriate; hybridization is very limited, and many previous reports of hybrids may refer to young birds. Thus, calolaemus (with pectoralis and homogenes; evidently occurring S of castaneoventris in W Panama) achieves species status, distinct from cinereicauda by its purple vs white throat (3), blue vs grey tail (3) and parapatry (3), and from castaneoventris by its blue vs green forecrown (3), purple vs white throat (3) and parapatry (3). Racial allocation of purple-throated birds of the Pacific coastal range of S Costa Rica (calolaemus or homogenes) is uncertain at present. Three subspecies recognized.
Food and feeding
Status and conservation
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