G***G
发帖数: 16778 | 1 1) Cottonmouth has a pit between eye and nostril, while water snake has no
pit.
2) Cottonmouth has single scale row underside of tail,
water-snake has double scale row underside of tail.
3) pupil in cottonmouth is elliptical.
while water-snake has a round pupil.
4) cottonmouths open their jarws wide in a threat.
water-snakes don't or if they open, they don't open as wide as cottonmouths.
5) cottonmouths vibrate their tail when they are disturbed.
water-snakes don't.
6) water-snake will readily dive beneath the water to escape predators
instead of
swimming across the surface.
Keep in mind that all of water snakes, including the cottonmouth can swim
completely submerged.
and that all of water snakes, including the cottonmouth can swim completely
on the surface.
7) outer edges of the bands of cottonmouth are usually black and narrow as
they approach the backbone.
water-snakes have the widest part of dark crossbands on their backs.
But Older adult cottonmouth may be a uniformed dark color, usually black,
without a discernable pattern.
9)water-snakes have a narrower head. (warning! nevertherless their heads can
be flattened to appear like that of cottonmouth) |
G***G
发帖数: 16778 | 2 in order to help people tell apart those two types snakes from each other.
I will paste some pictures here and let reader to tell them apart.
http://www.flickr.com/photos/slingher/4376422519/
cottonmouths.
【在 G***G 的大作中提到】
: 1) Cottonmouth has a pit between eye and nostril, while water snake has no
: pit.
: 2) Cottonmouth has single scale row underside of tail,
: water-snake has double scale row underside of tail.
: 3) pupil in cottonmouth is elliptical.
: while water-snake has a round pupil.
: 4) cottonmouths open their jarws wide in a threat.
: water-snakes don't or if they open, they don't open as wide as cottonmouths.
: 5) cottonmouths vibrate their tail when they are disturbed.
: water-snakes don't.
|
i*****s
发帖数: 15215 | |
G***G
发帖数: 16778 | 4 我现在就公布答案了。
它们都是无毒水蛇。
可能有人认为3是cottonmouth。我也一度认为。但是仔细分析后发现，它不是
cottonmouth
有人猜对了吗？
【在 i*****s 的大作中提到】
: 很好。
|
i*****s
发帖数: 15215 | 5 前两个是无毒蛇，第三个看着就是cottonmouth，怎么知道不是？
【在 G***G 的大作中提到】
: 我现在就公布答案了。
: 它们都是无毒水蛇。
: 可能有人认为3是cottonmouth。我也一度认为。但是仔细分析后发现，它不是
: cottonmouth
: 有人猜对了吗？
|
I***i
发帖数: 14557 | |
G***G
发帖数: 16778 | |
I***i
发帖数: 14557 | |
i*****s
发帖数: 15215 | |
k**h
发帖数: 2929 | |
G***G
发帖数: 16778 | 11 谢谢！的确如你所说的。
【在 i*****s 的大作中提到】
: 我搜了一下第三张，是Univ of George的Dr. Wilson拍的，他是研究两栖和爬行类的博
: 士，他说这是cottonmouth，应该就是了。
: http://srelherp.uga.edu/snakes/agkpis.htm
|
G***G
发帖数: 16778 | 12 对。
【在 k**h 的大作中提到】
: 第三个肯定是啦，瞳孔跟猫的一样，弱光下会放大的。有时候看起来就接近圆的了。
: band看来是对的。
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l**o
发帖数: 401 | |
R*****l
发帖数: 318 | |
