Ukunciphisa Kancane Ukuhambisa Izilwanyana Emhlabeni
Ehlobene kakhulu ne-armadillos kanye nezintambo, ama-sloth aqala eNingizimu Melika esikhathini esizayo se-Eocene, "ukusa kwendlela yokuphila yamuva," lapho iNingizimu Melika "yaba ikhaya lezilwane eziyingqayizivele zezilwane ezincelisayo, ama-edentates, ama-marsupials, nezinyoni eziningi ezingenakubalwa (Ama-Phorusrachids). " Kwakukhona ngesikhathi esisodwa kunezinhlobo ezingu-35 zezitshalo, kusukela e-Antartica kuze kufike eCentral America. Manje kunezinhlobo ezimbili kuphela eziphilayo ezinhlanu ezihlala emahlathini asezindaweni ezishisayo zaseCentral naseNingizimu Melika.
Kunezinhlobo ezimbili zezintambo ezimbili ezinamathole eNingizimu Melika - (i-Choloepus hoffmanni noma i-Unau) etholakala ezindaweni ezihlathini ezisenyakatho eNingizimu Melika kusukela e-Ecuador kuya eCosta Rica, kanye no- Choloepus didattylus eBrazil. Kunezinhlobo ezintathu zezinhlanzi ezintathu (Bradypus variegatus) e-Ecuador esogwini, ngokusebenzisa i-Columbia neVenezuela (ngaphandle kweLlanos, ne-Orinoco river delta), eqhubeka ezindaweni ezihlathini zase-Ecuador, ePeru, eBolivia, ephuma eBrazil futhi iqhubekela engxenyeni esenyakatho ye-Argentina ne-Central America,
Umehluko phakathi kwezinhlobo zezilwane, njengokuthiwa yigama, usezinzwaneni zangaphambili, njengoba zombili lezi zinhlobo zinezinzwane ezintathu ezisezinyaweni ezinyaweni, kodwa akuzona imindeni ehlobene.
Izilwane ezincelisayo ezihamba kancane emhlabeni wonke, izinhlanzi zaseNingizimu Melika zihlala ezihlahleni, eziphephile ezivela emadlelweni omhlaba. Bafeza imisebenzi yabo eminingi elenga phezulu emithini. Badla, balele, baqabane, babelethe, futhi bathambekele emncintiswaneni wabo osemncane.
Kuthatha cishe iminyaka emibili nesigamu ukukhula ubukhulu obugcwele, phakathi kwezinyawo ezimbili nengxenye nezinyawo ezimbili. (Okhokho babo, i-Giant Sloth ephelayo, ikhule ibe yindlovu.) Bangaphila iminyaka engamashumi amane.
Ngenxa yalokhu "ukuphila okuphambene", izitho zawo zangaphakathi zikhona izikhundla ezihlukene.
Izitshalo zihamba kancane kakhulu, zihamba cishe ngamamitha angu-53 ngehora.
Ngokushesha emithini, ingahamba cishe ngamamitha angu-480 / ihora, futhi ezimweni eziphuthumayo ziye zalandelwa ezihamba ngamamitha angu-900 / ihora.
Izitshalo zikhetha indlela yokuphila ehamba kancane. Basebenzisa iningi lokuphumula ngosuku futhi belele. Ebusuku, badla, behla emhlabathini ukuze bathuthele kwenye indawo noma bahlasele, ngokuvamile kanye kanye ngesonto.
Izitshalo zaseNingizimu Melika ziyizihlahla ezidliwayo futhi zidle amaqabunga omuthi, amahlumela nezinye izithelo. Izinhlobo ezimbili ezinamazinyo nazo zidla amahlumela, izithelo nezilwane ezincane. Izindlela zokugaya zazo ziphuza kakhulu, ngenxa yezinhlelo zabo zokuzilibazisa, zibavumela ukuba basinde ngokudla okuncane. Bathola amanzi abo emanzini amazolo noma ijusi emaqabunga. Lelizinga eliphansi le-metabolism lenza kube nzima ngabo ukulwa nezifo noma izimo ezibandayo.
Zinezinhlayiya ezinde, ezigobile ezivumela ukuba zibambe igatsha lomuthi futhi zihlale ngisho nalapho zilele. Basebenzisa izindebe zabo, ezinzima kakhulu, ukutshala amahlamvu. Ukukhula njalo nokuziqinisa, amazinyo abo agaya ukudla. Bangase basebenzise amazinyo abo ukuze badonsa kwisilwane.
Izitshalo zisebenzisa izinwele zabo ezindala, ezimpunga noma ezibomvu, ngokuvamile zihlanganiswe ne-blue-green algae ngesikhathi semvula, njengemibala yokuzivikela. Izinwele zabo zibafihla kusukela esiswini kuya emuva, ziwela phezu kwazo njengoba zimelelwe.
Izidakamizwa zihlanganisa izinyoka ezinkulu, i-harpy nezinye izinyoni, amajagu nama-ocelots.
Izitshalo zaseNingizimu Melika zinamakhanda amancane, ama-snouts amancane nezikhwebu ezincane. Bona lezi zithombe. Ngaphandle kwenani lezinzwane zangaphambili, kukhona ukuhlukana phakathi kwezintambo ezimbili ezinamazinyo nezinyawo ezintathu:
- Izintambo ezimbili ezinamazinyo zinama-vertebra ayisithupha noma ayisikhombisa
- Izintambo ezimbili ezinamazinyo azikho imisila. Imilenze yabo yangaphambili nangemuva ifana nobukhulu obufanayo
- Izintambo ezimbili ezinamazinyo zinezintambo ezincane, amehlo amakhulu futhi zihamba kaningi phakathi kwezihlahla
- Izintambo ezimbili ezinamazinyo akulula. Basebenzisa amazinyo abo okuthiwa i-canine ukuze alume.
- Izintambo ezinezintathu ezintathu zinama-vertebra ayisishiyagalolunye
- Izintambo ezinezintathu ezintathu zinomsila omncane. Imilenze yabo yangaphambili inomude kunemuva
- Izintambo ezinezintathu ezinezintambo ezincane nezamehlo amancane
- Izintambo ezinezinyosi ezintathu zinobubele obumnene, okwenza kube lula ukuthatha izilwane ezifuywayo. Manje sezinhla zohlobo lwezilwane ezisengozini.
Ngokuncintisana okuqhubekayo ngumuntu nomshini emahlathini emvula eNingizimu Melika, ama-sloth, njengezinye izidalwa zehlathi ezisezindaweni ezishisayo, zisengozini.