Slaty Flowerpiercer (Diglossa plumbea) [XC71539]
by Peter Boesman from Providencia Road, Cerro de la Muerte, San Jose, Costa Rica (call)
Slaty Flowerpiercer (Diglossa plumbea) [XC31751]
by Mike Nelson from Sendero Los Quetzales, Chiriqui Province, Panama (call)
Subspecies
Genus has sometimes been placed in Coerebidae or Parulidae or even, because of an apparent close relationship to Acanthidops, in Emberizidae. Molecular phylogenies indicate that it is most closely related to Xenodacnis and to Acanthidops, Haplospiza and Catamenia (the last three genera currently placed in Emberizidae), and that all clearly belong in present family. Members of this clade may also be closely related to the Oreomanes - Conirostrum clade. Forms a superspecies, and formerly considered conspecific, with Cinnamon-bellied Flowerpiercer (Diglossa baritula) and Rusty Flowerpiercer (Diglossa sittoides), genetic data suggesting that the three form a monophyletic group.
Proposed subspecies veraguensis (described from Cordillera de Veraguas, in south-western Panama) is now considered to be inseparable from populations in rest of species' range.
The following 2 subspecies are recognised:
plumbea Cabanis, 1861 - Costa Rica, western Panama.
veraguensis Griscom, 1927 - Pacific slope of western Panama (Veraguas).