...As long as easterly winds prevail, all enjoy good health; but in January, February, March, and April, the winds are variable, and sickness is general...
David Livingstone 「Missionary Travels and Researches in South Africa」
..."The quills are wholly yellow, with the exception of a dark brown,almost black band of variable breadth and position...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...Cardinal teeth small, fragile, variable in number, and rarely divaricated...
William Swainson 「Zoological Illustrations, Volume I」
...It is very variable in size: somespecimens may be but two and a half inches across theexpanded wings, while others are four inches...
Clarence M. Weed 「Butterflies Worth Knowing」
... Individual yield is so variable that a large number of snakes must be milked in order to determine the average yield...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Because of the variable reactions to snakebite, treatment should vary accordingly...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Fangs of captive cottonmouths were shed and replaced at intervals of about 21 days, but the interval was variable...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The food of the coon is variable, to conform with conditions ofdifferent sections, but wherever found, they feed on both vegetable andanimal food...
A. R. Harding 「Fur Farming」
...The coloration in the living frogs is highly variable due to extreme metachrosis...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The coloration in life is as variable as it is in preservative...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The color of the iris in living frogs varies from creamy silver to grayishyellow or bronze with a variable amount of black reticulation...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Walking birds, feeding both on the ground and in trees; bill slender,grooved, nostrils opening in a fleshy membrane; tail variable, short andsquare, or long and pointed; feet stout, often reddish...
Frank M. Chapman 「Color Key to North American Birds」
...A loud, low, deep-toned whoo, hoo-hoo-hoo,whooo-whooo, variable, but usually on the samenote; rarely a hair-raising scream...
Frank M. Chapman 「Color Key to North American Birds」
...Song, a rather loud wee-chee, chee, chee,cher-wee, variable in form but recognizable in tone...
Frank M. Chapman 「Color Key to North American Birds」
...The shoulder-stripe, which is so eminently characteristic of the species, is nevertheless variable in breadth, length, and manner of termination...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Brent, however, assures me that the number is variable with other domestic rabbits...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
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