Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Yellow-bellied Chat-tyrant (Silvicultrix diadema)


Taxonomy

French: Pitajo diadème German: Gelbbauch-Schmätzertyrann Spanish: Pitajo diademado
Taxonomy:

Myiobius diadema

Hartlaub

, 1843,

Bogotá, Colombia

.

Races may form two groups based on vocabulary: nominate and tovarensis appear to stand apart from the others, but much more evidence needed. Proposed race meridana (Mérida, in Venezuela) appears indistinguishable from nominate; cajamarcae (Cajamarca, in Peru) synonymized with gratiosa. Five subspecies recognized.

Subspecies and Distribution
  • S. d. jesupi (J. A. Allen, 1900) – Santa Marta Mts (N Colombia).
  • S. d. rubellula (Wetmore, 1946) – Sierra de Perijá, on Colombia–Venezuela border.
  • S. d. tovarensis (Gilliard, 1940) – Coastal Range in N Venezuela (Aragua, Distrito Federal).
  • S. d. diadema (Hartlaub, 1843) – E Andes in W Venezuela and Colombia.
  • S. d. gratiosa (P. L. Sclater, 1862) – W & C Andes and W slope of E Andes of Colombia S to N Peru (Piura, Cajamarca).
  • Descriptive notes

    12–12·5 cm. Large-headed appearance, long rictal bristles. Nominate race has crown dark olive, yellow forehead and long supercilium becoming narrower and paler behind... read more

    Voice

    Call an accelerating trill, ending with separate lower note; song a thin rapid trill, e.g. “... read more

    Habitat

    Dense interior and undergrowth of humid montane forest, less often along shrubby forest borders... read more

    Food and feeding

    Insects, mostly small beetles (Coleoptera). Generally inconspicuous and infrequently seen; usually in pairs in dense undergrowth close to... read more

    Breeding

    Jan–Oct in Colombia and Mar–Dec in Ecuador. Nest details unclear, but reported as a mossy cup placed on bank. Clutch 4 eggs. No... read more

    Movements

    Resident.

    Status and conservation

    Not globally threatened. Uncommon to locally fairly common; inconspicuous and often overlooked, possibly more common than it appears to be. Occurs in all protected areas in... read more

    Recommended citation

    Farnsworth, A. & Langham, G. (2019). Yellow-bellied Chat-tyrant (Silvicultrix diadema). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/57400 on 8 December 2019).