Key To Kansas Poisonous Snakes

I. No rattle or button on end of tail.

1. Color pink-brown to red-brown with 10-20 light-edged crossbands

on body, narrow on top and wider at lower side. Dark spot

coinciding with and between each crossband at lower edge of

side. Top of head copper-colored--COPPERHEAD, (page 7).

2. Always in vicinity of water. Pattern generally obscured by dark

grey or black. If pattern is obvious, crossbands not narrow on

mid-back and top of head not copper-colored (Note: extremely

restricted range in Kansas)--COTTONMOUTH (page 7).

II. End of tail provided with a button or rattles.

1. Top of head provided with paired plates, (see diagram), dark

colored, small size, MASSASAUGA (page 10).

2. Top of head covered with numerous small scales; no paired plates.

(a) tail pattern alternating black and chalk white bands--WESTERN

DIAMOND-BACK RATTLER (page 10).

(b) tail pattern same as rest of body--PRAIRIE RATTLER (page 11).

(c) tail entirely velvety black--TIMBER RATTLER (page 11).

[Illustration: TAIL TIPS]

TAIL TIPS

NONE

BUTTON

RATTLE

HEAD

MASSASAUGA

OTHER RATTLERS

TAILS OF RATTLERS

WESTERN DIAMOND-BACK

TIMBER

PRAIRIE

COPPERHEAD (_Agkistrodon contortrix_). Length usually 2-3 feet. Common

where it occurs, the copperhead is probably the most abundant poisonous

snake in eastern Kansas. It is most frequently found in the vicinity of

rocky ledges in oak-hickory-walnut woods, but it ranges widely, so that

individuals may be found in almost any habitat during summer months.

Although generally nocturnal during most of its active season, its habit

of lying in the open during the daytime among dried leaves in patches of

sunlight and shadow causes the pattern to blend perfectly with the

background. Any hiker through this habitat should be alert. Because of

the rather small size, usually inoffensive disposition, and the low

toxicity of its venom this snake should be placed on the non-fatal list

for adults. Elderly persons, those in poor health, or small children

could find the copperhead bite fatal, however.

[Illustration: Map]

A subspecies of the copperhead occurs along the southern border of

Kansas. In this form, the crossbands are wider along the mid-line than

the more northern variety.

Young copperheads have a sulfur-yellow tail. This color is lost as the

snake matures. It is thought that this contrasting tail color is used as

a lure to bring prey within striking distance of the small snake. The

young are born in August or September. There may be from two to ten in a

litter.

COTTONMOUTH (_Agkistrodon piscivorus_). Length 3-4 feet. The poisonous

water moccasin has been taken only once in Kansas. This was on the

Neosho River in Labette County at the Cherokee County line. It is on the

basis of this single specimen that it is counted as one of the snakes of

Kansas! The many general reports of water moccasins in Kansas refer to

the mistaken identification of the harmless water snakes that are common

throughout most of the state (see page 12). Young cottonmonths are

patterned quite like a wide-banded copperhead, but the colors are not so

reddish. These snakes are always found in the vicinity of water. When

approached they quite often hold their ground and open their mouths

widely, revealing the white lining of the mouth, a habit which gives

them their common name. This heavy-bodied snake is dangerously poisonous

and, contrary to popular belief, can bite underwater.

[Illustration: Map]

Whereas the copperhead is a rather mild-mannered snake, the cottonmouth

has a vicious disposition. Although nocturnal, it likes to sun-bathe,

and it is frequently seen basking along shorelines, stretched out on low

branches or upon the bank. Where this snake occurs, it is usually

common.

Generally, eight or nine young are born in August or September, although

the number of young may range from five to fifteen. Like the copperhead,

the young have a yellow tail tip.

[Illustration: COPPERHEAD]

[Illustration: COTTONMOUTH]

[Illustration: MASSASAUGA]

[Illustration: WESTERN DIAMOND-BACK]

[Illustration: TIMBER RATTLER]

[Illustration: PRAIRIE RATTLER]

Poisonous Snakes of Kansas · 第 5 / 17 题