Cov poj koob yawm txwv ntawm pab pawg khej thiab nquab yog archosaurs los ntawm Cretaceous, tej zaum yog av av los yog ib nrab dej. Lawv sawv tawm rau lawv qhov loj; Piv txwv li, Sarcosuchus imperator nruab nrab ntawm li 11 thiab 12 meters. Txawm li cas los xij, raws li lawv tau hloov zuj zus thiab ua kom cov dej nyob ib puag ncig, lawv tau txo lawv lub cev loj. Hnub no, muaj
Txawm li cas los xij, crocodiles yog pab pawg tam sim no muaj feem cuam tshuam nrog cov noog, thiab lawv cov poj koob yawm txwv tej zaum tau nyob hauv lub ntiaj teb txog 240 lab xyoo dhau los. Ntawm qhov tod tes, lawv sib cais ntau dua los ntawm lizards thiab nab, pab pawg uas lawv feem ntau cuam tshuam. Yog koj xav paub crocodiles nyob qhov twg, thiab lwm yam yam ntxwv ntawm cov tsiaj ntxim nyiam no, nyeem cov kab lus no hauv peb lub xaib.
Kab Qwj
Crocdiles muaj qee tus yam ntxwv uas tau tso cai rau lawv nyob rau ntau qhov chaw hauv ntiaj teb, xws li:
- Speed: Crocodiles have a semi-erect posture, uas tso cai rau qee hom mus txog qhov ceev ntawm 16 km / h.
- Third eyelid: Lawv muaj daim tawv muag thib peb translucent, los yog nictitating membrane, ib qho tshwj xeeb koom nrog cov noog.
- Peripheral Vision: Lawv ob lub qhov muag tau hloov mus rau peripheral tsis pom kev, tso cai rau lawv mus soj ntsuam cov tsiaj nyob rau hauv yuav luag txhua txoj kev tsis txav lub taub hau lossis lub cev.
- Hloov cov hniav: Koj cov hniav tau hloov tas li, tso cai rau koj los hloov cov hniav cuav.
- Lawv ua pa thaum dhia dej: Lawv qhov ntswg kab noj hniav sib cais los ntawm lawv lub qhov ncauj los ntawm ib txheej ntawm cov pob txha (secondary palate), uas tso cai rau lawv mus Ua pa thaum lawv dhia dej, thiab tuav lawv lub puab tsaig kom muaj zog tom.
- Pressure detectors: lawv muaj lub tshuab ntsuas siab nyob rau hauv lub puab tsaig uas pab txhawb kev xaav ntawm lub siab nthwv dej hauv dej, thiab yog li ntes lawv cov tsiaj txhu.
- Kev sib deev yog txiav txim los ntawm ib puag ncig: Kev sib deev yog txiav txim los ntawm ib puag ncig, nyob ntawm qhov kub thiab txias ntawm cov qe incubated. qe yuav txiv neej los yog poj niam.
- Lawv tso ntsev: Crocodiles kuj muaj qog ua kua ntsev, uas ua rau lub neej nyob rau hauv ntug dej hiav txwv ib puag ncig yooj yim dua.
- Lawv tu lawv cov me nyuam: lawv muaj niam txiv tu, yog, lawv tu lawv cov me nyuam mus txog thaum lawv muaj ib lub cev. loj, ncav mus txog 3 lossis 4 xyoos. Peb nthuav qhia cov ncauj lus no hauv Crocodile incubation - Ib puag ncig thiab ntev.
- Digestion: Zoo li noog, lawv lub plab zom mov muaj ib qho chaw ntxiv uas pab zom tau.
Ntawm qhov tod tes, nws tseem ceeb heev uas yuav tsum nco ntsoov tias crocodiles thiab alligators tsis zoo ib yam. Yuav kom kawm paub qhov txawv ntawm lawv, peb xav kom koj nyeem lwm tsab xov xwm no ntawm peb qhov chaw hais txog Qhov txawv ntawm tus nab npawb thiab cov khej.
crocodiles nyob qhov twg?
Crocdiles tsuas yog pom nyob rau hauv tropical and subtropical area, ib txwm txuam nrog dej. Peb feem ntau koom nrog crocodiles nrog thaj chaw swampy thiab thaj chaw, tab sis qhov tseeb yog tias lawv kuj nyob thaj chaw uas tib neeg frequented.
Nyob khej me
Lawv muab faib ua peb tsev neeg:
- Gavialidae.
- Alligatoridae.
- Crocodylidae.
Ntawm no peb yuav tsom mus rau yav tom ntej thiab, xav tias muaj ntau hom tam sim no, peb yuav sau qee qhov piv txwv nyob ntawm lawv qhov kev faib tawm. Niaj hnub no cov crocodiles nyob Asia, Australia, Africa thiab America
Australian crocodiles nyob qhov twg
Nyob hauv cov hom muaj nyob hauv Australia, cov hauv qab no sawv tawm:
- Porous Crocodile (Crocodylus porosus): Hu ua porous or marine crocodile, lawv nyob hauv dej ntws, pas dej, estuaries, thiab swamps thiab yog haiv neeg. mus rau sab hnub tuaj Asia mus rau sab qaum teb Australia. Lawv tuaj yeem ncav cuag 6 lossis 7 meters ntev, nrog cov poj niam me dua.
- Johnston's crocodile (Crocodylus johnstoni): Johnston's crocodile or Australian freshwater crocodile, as its name suggests, is Northern Australia and frequents. wetlands thiab dej ntws. Nws yog ib hom me me txog li 2 txog 3 meters thiab paub tias muaj peev xwm "khiav".
Yog koj tseem xav paub tias crocodiles noj dab tsi, tsis txhob nco lwm tsab xov xwm txog Crocodile feeding.
Hmoob Asian khej nyob
Cov hom tsiaj loj Asian khej thiab lawv qhov chaw nyob muaj raws li nram no:
- Tidal Crocodile (Crocodylus palustris): Tidal Crocodile nyob ntau thaj chaw ntawm Asia, los ntawm Is Nrias teb, Bangladesh, Sri Lanka, Pakistan, Nepal, mus rau sab qab teb mus rau Iran. Nws ntsuas nruab nrab ntawm 4 thiab 5 meters thiab feem ntau thaj chaw ntawm pas dej, dej ntws thiab marshes thiab muaj qee qhov kam rau dej ntsev.
- Siamese crocodile (Crocodylus siamensis): Siamese crocodile is native to Southeast Asia and the islands of Borneo and Java. Nws yog ib hom me me, txij li nws feem ntau tsis tshaj peb meters ntev. Nws cov pejxeem tsawg heev vim nws muaj kev phom sij txog kev ploj tuag.
- New Guinea crocodile (Crocodylus novaeguineae): Hu rau New Guinea crocodile vim nws yog neeg nyob rau lub koog no, nws yog hom me me. nyob rau hauv loj, ncav cuag 3.5 meters. Lawv yog hmo ntuj thiab muaj ob pawg neeg sib cais los ntawm roob.
- Philippine crocodile (Crocodylus mindorensis): Philippine los yog Mindoro crocodile is endemic to the Philippines (piv txwv li pom tsuas yog nyob rau hauv qhov chaw) thiab yog ib qho ntawm cov kwj dej uas muaj kev phom sij tshaj plaws. Tam sim no nws yog categorized li yooj yim. Nws yog qhov me me, ntsuas ntawm 2 txog 3 meters.
Koj kuj xav paub seb 11 tus tsiaj uas txaus ntshai tshaj plaws hauv Asia yog dab tsi.
Kwv tij nyob teb chaws Africa
Nyob hauv cov tsiaj nyob hauv teb chaws Africa thiab lawv qhov chaw nyob, cov hauv qab no sawv tawm:
- Nile crocodile (Crocodylus niloticus): Nile crocodile yog tus khej loj thib ob hauv ntiaj teb, ncav txog 6 meters ntev. Nws nyob hauv sub-Saharan Africa thiab Madagascar, yog li nws tsis yog tshwj xeeb rau Nile, raws li nws lub npe txhais tau hais tias, thiab nws nquag pas dej thiab dej ntws.
NORREEN African Crocodile (Crocodus Arce, Senegal, Mauritania, Burkina Faso, Ivory Coast, Democratic Republic of the Congo, Chad, Benin, Zimbabwe, Central African Republic thiab Nigeria. Nws tuaj yeem ncav cuag li 2 txog 5 meters ntev.
Teb Chaws Asmeskas Crocodiles Live
American crocodiles, this is where they live:
- River crocodile (Crocodylus acutus): tus dej los yog American crocodile inhabited from the South America, Central America, mus txog rau sab qaum teb. Peru. Nws yog hom loj heev uas feem ntau ntsuas ntawm 3 thiab 4 meters, tab sis tuaj yeem ncav cuag 7 meters ntev. Nws nyob hauv ntug dej hiav txwv, estuaries thiab estuaries ntawm cov dej ntws thiab ntws.
- Swamp crocodile (Crocodylus moreletii): Swamp crocodile yog ib hom me me txog li 3 meters uas nyob ntawm Guatemala mus rau Mexico. Nws nyiam thaj chaw swampy nyob rau hauv ib qho chaw cais thiab desolate.
Nyob hauv teb chaws Amelikas muaj ob leeg nquam paj nquam nruas thiab crocodiles, tom kawg pom tshwj xeeb thoob plaws hauv Caribbean, Caribbean Islands tuaj, Florida thiab Gulf of Mexico. Ntawm qhov tod tes, nyob hauv Africa, cov neeg nyob sab hnub tuaj muaj feem cuam tshuam nrog cov neeg Amelikas ntau dua li cov nyob rau sab hnub poob, yog li cov poj koob yawm txwv ntawm cov khej nyob rau thaj tsam Asmeskas yuav tsum tau ua kom nws hla hiav txwv los ntawm Africa.
