. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Hornbill systematics and zoogeography 341 i i 1 1 1 1 1 1 i ! I A 1 ! I 1 fulfil; CD c1 1 1 1 ! i ' ij 1 ll 1 MÃ- i ñ 'â !!â !;Ã-h,,¡; 1 Hf- â -fâr- Iii j Hi j i. tflH. 1 1 i 1 1 I I t M , F ! Nf, iiiiii ^ ^41 Fig. 12: Sonagrams of the loudest calls of Aceros hornbill species. A â A. comatus; B â A. cassidix; C â A. corrugatus; D â A. waldeni; E â A. plicatus; F â A. undulatus. guiar area: adult male, circumorbital pale blue, guiar scarlet with blue flecks around
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Hornbill systematics and zoogeography 341 i i 1 1 1 1 1 1 i ! I A 1 ! I 1 fulfil; CD c1 1 1 1 ! i ' ij 1 ll 1 MÃ- i ñ 'â !!â !;Ã-h,,¡; 1 Hf- â -fâr- Iii j Hi j i. tflH. 1 1 i 1 1 I I t M , F ! Nf, iiiiii ^ ^41 Fig. 12: Sonagrams of the loudest calls of Aceros hornbill species. A â A. comatus; B â A. cassidix; C â A. corrugatus; D â A. waldeni; E â A. plicatus; F â A. undulatus. guiar area: adult male, circumorbital pale blue, guiar scarlet with blue flecks around perimeter; adult female, circumorbital duller blue than male, angle of jaw and across throat dark blue to deep violet, traversing scarlet guiar with blue edge (Deignan 1945); juvenile, undescribed. Eye colour: adult male and adult female, red; juvenile, greenish-white. Leg col- our: adult male, black, adult female and juvenile, undescribed. Loudest call (no recording available): loud croak (Deignan 1945), various loud roars, croaks, cackles and short bark, female at higher pitch than male (Ali & Ripley 1970). Display: head thrown back, red hair on end, guiar skin inflated, bill erect and wide open, wings hanging loosely and quivering slightly, every now and then tail jerked up until almost touches head (Baker in Ali & Ripley 1970). Species: A. cassidix (Temminck, 1823). (19d, 23, 28a [wrinkled], 37 [facial skin].) Casque form: adult male, large helmet-like crest from above forehead to abrupt end a third of way along bill; adult female, similar to male but smaller. Bill colour: adult male and adult female, yellow with red-brown casque and orange-brown ridges on bases of both mandibles; juvenile, undescribed. Bare skin: smooth, circumorbital and extensive guiar area: adult male,. 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 ma
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
