Adult wing length: 5.75 – 6.5 (146 – 165 mm); tail length: 6.1 – 7.1 in (155 – 179 mm); adult weight: 4.95 oz (140.3 g); adult coloration: dark violet blue back, a black bib, pale yellow underparts, tail band, and nape, spots of blue above and below the eye, and of course, a short crest of stiff, “plush-like” crown feathers. Juveniles lack the pale spots above and below the eye, and the malar stripe is vestigial. Immature adults are similar to adults, but the pale eye spots are small and drab. Appearance: robust build, strong legs and nostrils covered by bristle-like feathers.