. Birds of the United States east of the Rocky Mountains, a manual for the identification of species in hand or in the bush;. Birds; Birds. 18 EXTERNAL PARTS parrots the cere is generally covered with feathers, and looks much like a part of the forehead, but as the nostrils open through it, it must be considered as part of the bill. Positions of the nostrils. — The nostrils are frequently in a sort of hollow which has already been spoken of as a nasal The groove, if long and narrow, is sometimes called the nasal Many birds show no evident fossae at all, but the nostrils open f
. Birds of the United States east of the Rocky Mountains, a manual for the identification of species in hand or in the bush;. Birds; Birds. 18 EXTERNAL PARTS parrots the cere is generally covered with feathers, and looks much like a part of the forehead, but as the nostrils open through it, it must be considered as part of the bill. Positions of the nostrils. — The nostrils are frequently in a sort of hollow which has already been spoken of as a nasal The groove, if long and narrow, is sometimes called the nasal Many birds show no evident fossae at all, but the nostrils open flush with the surface of the There are a number of terms used to denote the position which the nostrils occupy in the upper mandible. They are almost universally lateral,4 that is, on the sides of the mandi- ble, away from the ridge; rarely they are culminal,5 that is, together on the ridge of the culmen. The position on the sides, with reference to the width and length of the man- dible, is defined as follows: superior& indicates a position above the central line between the culmen and the tomia, and inferior7 below it; basal* indicates a position at the fore- head; sub-basald near it; median10 half way between the base and the tip of the bill; terminal" nearer the tip than the base. Kinds of nostrils. — The nostrils are usually open or pervious. Sometimes they are not distinctly open, in which case they are said to be impervious. Usually the two nostrils are sepa- rated by a partition; they are then said to be Barely it is possible to see through the nostrils from side to side, as in the turkey buzzard, when they are said to be per- forate.™ Forms of nostrils. — A linearu nostril is elongated and of. 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 Apgar, Austin Craig,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
