. Fourteen weeks in zoology. Zoology. 116 SUBKINGDOM VEETBBEATA. the former replaced by the brown-olive of the latter, the two birds could hardly be Mg. SiaRa si3lis. Blue-bird. distinguished.* Motacillidse. — The Wagtail incessantly flirts its tail up and down, accompanying each elevation with a jerking spread. This is due to the length of the tarsi (Fig. 184), which, on the lowering of the bill, throws the centre of gravity in front of the feet and gives the body a constant tendency to tumble forward. The quickly-expanding tail striking against the air, raises the head again with littl
. Fourteen weeks in zoology. Zoology. 116 SUBKINGDOM VEETBBEATA. the former replaced by the brown-olive of the latter, the two birds could hardly be Mg. SiaRa si3lis. Blue-bird. distinguished.* Motacillidse. — The Wagtail incessantly flirts its tail up and down, accompanying each elevation with a jerking spread. This is due to the length of the tarsi (Fig. 184), which, on the lowering of the bill, throws the centre of gravity in front of the feet and gives the body a constant tendency to tumble forward. The quickly-expanding tail striking against the air, raises the head again with little effort. Fig. 189. Fig. 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
