Family Tanagers (Thraupidae)

Least Concern

Streaked Dacnis (Xenodacnis petersi)


Taxonomy

French: Xénodacnis de Peters German: Strichelkopfpitpit Spanish: Dacnis andino norteño
Taxonomy:

Xenodacnis petersi

J. Bond and Meyer de Schauensee

, 1939,

Yánac, Ancash, Peru

.

Hitherto treated as conspecific with X. parina, although given species rank when first described, with good reason: differs in its (in male) bright blue shaft streaks (present but less obvious on race bella) vs none (1); (in female) mid-crown to nape ashy brown vs dull blue (3); blue vs ferruginous on malar area at base of lower mandible (ns[1]); blue vs whitish subocular line (1); much larger size (five male wings comprising nominate 82.5, 79, 78 mm and bella 76.5, 75.5 vs two X. parina 66.5, 61.5#R; allow 3); moreover, commonest song type very different (lower speed and lower number of notes: 2+2=4)#R. Race bella marginally smaller and duller. Names petersi and bella described simultaneously, but latter as a race of former, so petersi claims priority. Two subspecies recognized (but see below).

What do (1) and (2) mean? Learn more about the scoring system.
Subspecies and Distribution
  • X. p. bella J. Bond & Meyer de Schauensee, 1939 – NC Peru (S Amazonas and La Libertad N of R Marañón).
  • X. p. petersi J. Bond & Meyer de Schauensee, 1939 – C Peru on W slope of Andes in Ancash, Huánuco (W of R Marañón) and Lima.
  • Also, race uncertain, SC Ecuador (mainly in Cajas National Park#R); sightings and specimens originally believed probably referable to bella, but recent dissertation#R considers the population involved to be taxonomically distinct (and relatively distinctive, the birds being larger and notably heavy); name not yet validly introduced.

    Descriptive notes

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    Recommended citation

    del Hoyo, J. & Collar, N. (2019). Streaked Dacnis (Xenodacnis petersi). 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/1344189 on 21 May 2019).