. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 35 (1984) Heft 1-3 Variation in Gypaetus barbatus 11 AB CD i 1 i 1 i 1 i 1 n=45 n=34 n=39 n=109 () (647%) (355%) () () 1 3 4 2 5 6 7 8 9 17 19 10 16 15 18 11 U 13 12. I . 1 OA- I ; Fig. 4: Similarity dendrogram of the 19 phenetic types of bearded vultures as character- ized in Table 1. Four guilds (A, B, C, D) are differentiated. N = number of specimens in each group. () = percentage of individuals corresponding to the bes
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 35 (1984) Heft 1-3 Variation in Gypaetus barbatus 11 AB CD i 1 i 1 i 1 i 1 n=45 n=34 n=39 n=109 () (647%) (355%) () () 1 3 4 2 5 6 7 8 9 17 19 10 16 15 18 11 U 13 12. I . 1 OA- I ; Fig. 4: Similarity dendrogram of the 19 phenetic types of bearded vultures as character- ized in Table 1. Four guilds (A, B, C, D) are differentiated. N = number of specimens in each group. () = percentage of individuals corresponding to the best represented type in each group. Group D includes specimens with perfect adult plumage (type 12) or with adult plumage with slight vestiges of immature plumage (types 13 and 14). Type 13 differs from type 12 only in the presence of two-colored marginal coverts, which may be typical of the first adult plumage. As far as this is concerned, we must remember that Dementiev & Gladkov (1966) point out the presence of imperfections in the first adult plumage of Bearded Vultures. Types 13 and 14 probably correspond to specimens in their first adult plumage and type 12 to adults in subsequent plumages. The higher frequency of certain types within their corresponding group (Fig. 4) may be due to different facts, namely: (a) They represent a relative stabilization of the molting process ( types 1 and 12, including juveniles which left the nest and adults). (b) They comprise periods of time relatively longer than other types of the group in the molting process (type 5), or (c) They typify the molting process more frequently followed by the species, as it seems to be the case of types 11 and 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 :
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