White-crowned Parrot

Here the details of the White-crowned Parrot named bird below:

SCI Name:  Pionus senilis
Protonym:  Psittacus senilis Av.Sp.Nov.Brasil. 1 p.42 pl.31 fig.1
Taxonomy:  Psittaciformes / Psittacidae / Pionus
Taxonomy Code:  whcpar
Type Locality:  No locality, Vera Cruz, Mexico, designated by Griscom, Am. Mus. Novit., no. 379, 1929, p. 6.
Author:  von Spix
Publish Year:  1824
IUCN Status:  Least Concern

DEFINITIONS

PIONUS
(Psittacidae; Ϯ Blue-headed Parrot P. menstruus) Gr. πιων piōn, πιονος pionos  fat, obese; "Genus XVII.  Pionus*) Wagl.  Maïtaca.  Rostrum subintumidum; nares, lingua et pedes Psittacorum; cauda abbreviata, aequalis, alis magnis fere tecta; caput magnum; corpus breve, crassum.  Sexus colore non variant.  ...  Species: A. Rostro subparvo, compressiusculo: α. crisso rubro: 1. P. menstruus.  —  2. P. Maximiliani.  —  3. P. senilis.  —  4. P. purpureus.  —  5. P. sordidus.   ...   *) Πιων obesus. — Maïtaca audiunt hae aves apud indigenas Brasiliae" (Wagler 1832); "Pionus Wagler, Abh. K. Bayer. Akad. Wiss., Math.-Phys. Kl., 1, 1832, p. 497. Type, by subsequent designation, Psittacus menstruus Linné (G. R. Gray, List Gen. Bds., 1840, p. 52)." (Peters 1937, III, 214).
Var. Pionias, Pione.

senilis
L. senilis  of an old man, senile (i.e. white-haired, hoary)  < senex, senis  old person.