. The Emu : official organ of the Australasian Ornithologists' Union. Ornithology; Birds. Vol igio'^' ] Jackson, Notes on Tooth-billed Bower-Bird of 85 formation of the bill which gives to the Tooth-billed Bower-Bird its right to that name. The accompanying life-size photograph of the head of one of these birds gives a clear illustration of the three saw-like indentations which are present on each side in the bird's lower mandible, together with the corres- ponding serrations which match them in the upper one. It. must be understood that the serrations in the lower mandible are actually i
. The Emu : official organ of the Australasian Ornithologists' Union. Ornithology; Birds. Vol igio'^' ] Jackson, Notes on Tooth-billed Bower-Bird of 85 formation of the bill which gives to the Tooth-billed Bower-Bird its right to that name. The accompanying life-size photograph of the head of one of these birds gives a clear illustration of the three saw-like indentations which are present on each side in the bird's lower mandible, together with the corres- ponding serrations which match them in the upper one. It. must be understood that the serrations in the lower mandible are actually in that mandible itself, but in the case of the upper one they are really recessed on the sides of the hard palate or roof of the bill. The points of the lower serrations fit into the recesses of the upper, thus giving the bird a gripping hold and cutting edges. Were it not for this fact, a bird so comparatively small would not be able to sever the tough and thick stems of the larger leaves which he chooses for his bower ornamentation. In the plate the serrations of the upper mandible are not shown, because in actual fact they are not visible in profile ; it is only when a specimen is handled that one is able to turn the head into such a position that they become 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 Royal Australasian Ornithologists' Union. Melbourne : Royal Australasian Ornithologists Union
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1901
