. Bulletin. Natural history; Natural history. Ibb Illinois Natural History Survey Bulletin Vol. 28, Art. 1 Baby copperheatls, like juvenile cotton- Geographic variation in this snake is dis-j mouths, have sulfur-yellow tails. As the cernible only in details of color and pattern,j snakes become older, the yellow is replaced table 88. Specimens from the Mississippij by black. There is a slifrht tendency toward River counties show some influence of the} proportionately shorter tails in adult snakes. Austroriparian race, A. c. contortrix. by] table 87. having relatively paler hues, more con- k-n^.
. Bulletin. Natural history; Natural history. Ibb Illinois Natural History Survey Bulletin Vol. 28, Art. 1 Baby copperheatls, like juvenile cotton- Geographic variation in this snake is dis-j mouths, have sulfur-yellow tails. As the cernible only in details of color and pattern,j snakes become older, the yellow is replaced table 88. Specimens from the Mississippij by black. There is a slifrht tendency toward River counties show some influence of the} proportionately shorter tails in adult snakes. Austroriparian race, A. c. contortrix. by] table 87. having relatively paler hues, more con- k-n^.-^atyikt. Fig. 247.—An adult Agkistrodon contortrix mokeson from Alexander County, Illinois. Th« groundcolor is tan or light red-brown ; the bands are rich red-brown. Table 86.—Sexual variation in Illinois Agkistrodon contortrix. Figures in parentheses are numbers of specimens. Characteristic Males (23) Females (16) Range Mean Range Mean 41-50 41-46 Tail length as percentage of total length Table 87.—Ontogenetic variation in proportionate tail length in Illinois Agkistrodon con^ tortrix. Figures in parentheses are numbers of specimens. Charactkristic Under 500 mm. Total Length (19) 500-800 MM. Total Length (12) Over 800 mm. Total Length (6) Range Mean Range Mean Range Mean Tail length as percentage of total length. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
