A Dictionary of Birds
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In our eReader you can find the full English version of the book. Read A Dictionary of Birds Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Dictionary of Birds
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OIL-BIRD, see GUACHARO.
OIL-GLAND (glandula uropygialis), in Birds the only cutaneous gland except some small organs in the external ear-passages. Con- sisting of two symmetrical portions, more or less united posteriorly in shape of a heart since each half is broad and rounded in front and pointed behind it is seated upon the levator muscles at the root of the tail. Internally it is formed of numerous secretory tubules which gradually unite in a common cavity opening on the surface through a va...riable number of orifices there being from 3 to 5 of them in many Water-birds, though only one to each half in Anseres frequently prolonged in form of a nipple and occasionally united in a single tube, the double origin of which is, however, shewn by a median septum. In the HOOPOE alone, according to Nitzsch, there is but one orifice to the common cavity, wherein the stinking secretion of the gland, for which the female during incuba- tion and the young while they stay in the nest are notorious, is stored.
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To quickly assess the difficulty of the text, read a short excerpt:
OIL-BIRD, see GUACHARO.
OIL-GLAND (glandula uropygialis), in Birds the only cutaneous gland except some small organs in the external ear-passages. Con- sisting of two symmetrical portions, more or less united posteriorly in shape of a heart since each half is broad and rounded in front and pointed behind it is seated upon the levator muscles at the root of the tail. Internally it is formed of numerous secretory tubules which gradually unite in a common cavity opening on the surface through a va...riable number of orifices there being from 3 to 5 of them in many Water-birds, though only one to each half in Anseres frequently prolonged in form of a nipple and occasionally united in a single tube, the double origin of which is, however, shewn by a median septum. In the HOOPOE alone, according to Nitzsch, there is but one orifice to the common cavity, wherein the stinking secretion of the gland, for which the female during incuba- tion and the young while they stay in the nest are notorious, is stored.
What to read after A Dictionary of Birds?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Newton to read onlineMoreLess
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