. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 35 (1984) Heft 1-3. 3 Fig. 1: Different patterns of plumage in the head region. 1: Only brown-blackish feathers are present in the crown, the occiput and the nape. The "eyebrow" is not differentiated. 2: It differs from 1 by the presence of brown semiplumes in the crown and an incomplete dark-brown "eyebrow". 3: Brown semiplumes and white semiplumes in the crown. Brown- blackish feathers and white feathers in the occiput and the nape. Well differ
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 35 (1984) Heft 1-3. 3 Fig. 1: Different patterns of plumage in the head region. 1: Only brown-blackish feathers are present in the crown, the occiput and the nape. The "eyebrow" is not differentiated. 2: It differs from 1 by the presence of brown semiplumes in the crown and an incomplete dark-brown "eyebrow". 3: Brown semiplumes and white semiplumes in the crown. Brown- blackish feathers and white feathers in the occiput and the nape. Well differentiated black-coloured "eyebrow". 4: White semiplumes in the crown. White feathers in the occi- put and the nape. "Eyebrow" like 3. Each of the states in the multistate characters was considered to operate as a two-state character, as follows: Eyebrow: A thin fringe in the superciliary region formed by bristles. We distinguished three states: 17. — Without differentiated eyebrow (Fig. 1: 1). 18. — With an incomplete dark-brown colored eyebrow (Fig. 1: 2). 19. — Complete eyebrow, well differentiated, black colored (Fig. 1: 3 and 4). Steel gray color in the web of the big scapulars and flight feathers. Three states can be distinguished: 20. — Lack of steel-gray color. 21. — Presence of steel-gray color but never covering more than 50 °7o of the vane. 22. — Presence of steel-gray color covering most of the vane. The following measurements were taken of each specimen: WL = Wing length with tape following the curvature TL = Tail length from the base of the rectrices. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
Size: 1569px × 1593px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
