Khov nas, feem ntau yog hais txog cov nas khov thiab cov nas khov hauv lub qhov ncauj nyiam cov neeg khib. Lawv tau ua tau zoo chilled pub rau cov reptile nyiam. Cov khoom noj no yog los ntawm nas kev noj qab haus huv lossis nas uas tau ua tib zoo tswj hwm tau. Thaum cov nas mus txog lub xeev noj qab nyob zoo, lawv yuav ua kom zoo dua los ntawm hluav taws xob hluav taws xob (thiab tom qab ntawd tsis muaj cov khoom siv hluav taws xob kom tswj tau lawv cov khoom noj tshiab thiab cov as-ham.
Cov txheej txheem ntau lawm ntawm cov nas khov ua kom ntseeg tau tias lawv muaj kev noj zaub mov zoo thiab tsim nyog rau kev noj haus xav tau ntawm cov tsiaj reptiles. Lawv muaj cov saj zoo thiab tuaj yeem nyiam qhov qab ntawm cov tsiaj. Ib qho ntxiv, cov qauv zoo ntawm cov nas khov yog nruj. Los ntawm kev yug me nyuam kom khov, txhua kauj ruam yog nqa tawm raws li cov kev cai los xyuas kom muaj kev nyab xeeb thiab xwm yeem ntawm cov khoom. Rau kev yug menyuam, pub cov nas khov kuj tseem yooj yim heev. Tsis muaj kev ua nyuaj yog qhov yuav tsum tau ua thiab lawv tuaj yeem siv ncaj qha, uas txuag tau zoo thiab lub zog.
Nyob rau hauv dav dav, khov nas tau dhau los ua cov tsiaj reptile tsiaj vim lawv cov khoom noj muaj zog, siv tau yooj yim. Nws tsis yog tsuas yog ua tau raws li cov kev xav tau ntawm cov tsiaj uas xav tau ntawm cov tsiaj, tab sis kuj ua kom yooj yim ntawm kev tswj hwm txhua hnub ntawm kev tswj hwm. Nws yog tus pab loj rau cov neeg khav theeb nyiam.