內(nei)蒙古西部、甘肅、青海(hai)、新疆、寧夏、蒙古國(guo)全境
體(ti)(ti)型細(xi)小,成(cheng)體(ti)(ti)全(quan)長約(yue)40~50cm。體(ti)(ti)底(di)色(se)(se)多為(wei)乳白(bai)色(se)(se)至淺(qian)沙黃(huang)色(se)(se),有2列黃(huang)褐色(se)(se)圓(yuan)形(xing)斑(ban)(ban)(ban)(ban),部分個(ge)體(ti)(ti)斑(ban)(ban)(ban)(ban)塊形(xing)狀(zhuang)(zhuang)不(bu)規則(ze),邊緣(yuan)呈鋸齒狀(zhuang)(zhuang)或細(xi)碎狀(zhuang)(zhuang)斑(ban)(ban)(ban)(ban),斑(ban)(ban)(ban)(ban)塊約(yue)占4~5背鱗(lin)(lin)寬(kuan)(kuan),邊緣(yuan)色(se)(se)深而中央接色(se)(se)淺(qian),接近體(ti)(ti)底(di)色(se)(se),靠近腹鱗(lin)(lin)一側(ce)開(kai)放,左右(you)交(jiao)錯(也有部分斑(ban)(ban)(ban)(ban)塊在體(ti)(ti)中后(hou)段(duan)左右(you)對(dui)稱排布(bu)),兩列色(se)(se)斑(ban)(ban)(ban)(ban)多在體(ti)(ti)中線(xian)處相(xiang)遇(個(ge)別個(ge)體(ti)(ti)不(bu)相(xiang)遇),每列斑(ban)(ban)(ban)(ban)塊前后(hou)相(xiang)隔約(yue)1.5~2枚背鱗(lin)(lin)寬(kuan)(kuan)(旭日干等2000)。頭(tou)枕部有1近似環形(xing)斑(ban)(ban)(ban)(ban),在枕部圍成(cheng)“心”形(xing)或其(qi)他不(bu)規則(ze)斑(ban)(ban)(ban)(ban);極個(ge)別在頂鱗(lin)(lin)后(hou)不(bu)相(xiang)遇。眼后(hou)有較寬(kuan)(kuan)黃(huang)褐色(se)(se)眉(mei)紋(wen),眉(mei)紋(wen)上、下緣(yuan)有明(ming)顯的乳白(bai)色(se)(se)細(xi)條紋(wen)。
喜食沙(sha)鼠、蜥(xi)蜴、蛙類,常在夜晚(wan)出動狩(shou)獵。
喜愛穴居(ju),性(xing)格暴躁,易(yi)主(zhu)動對人畜發起進攻。