Emu vs Rhea
Kev faib tawm thiab cov yam ntxwv ntawm lub cev yog qhov tseem ceeb hauv kev tshawb nrhiav qhov sib txawv ntawm emus thiab rheas. Taxonomical ntau haiv neeg yuav yog lwm yam uas muab qee qhov sib txawv ntawm ob qho no, tab sis ecology yuav luag zoo ib yam hauv ob qho tib si emu thiab rhea. Kab lus no tsom mus tshawb nrhiav thiab hais txog qhov sib txawv ntawm emu thiab rhea hauv qee yam ntawm biology.
Emu
Emu, Dromaius novaehollandiae (Kev Txiav Txim: Casuaryformes) yog tib tus tswv cuab ntawm cov genus no thiab cov noog loj tshaj plaws ntawm Australia. Lawv muaj ib lub tsev uas npog tag nrho lub xeev thaj chaw ntawm Australian av loj. Lawv loj hlob mus txog ob meters ntawm qhov siab, txog 1.5 meters ntawm lub cev ntev, thiab 55 kilograms ntawm qhov hnyav. Emus muaj peb hom subspecies thiab tsuas muaj qhov sib txawv me ntsis ntawm lawv. Lawv muaj xim av xim plumage nrog dawb thaj ua rau thaj rau nws, thiab cov plaub yog nto moo rau lawv softness. Emus tuaj yeem khiav deb ntawm qhov nrawm dua li ntawm 50 km ib teev. Lawv ob txhais ceg muaj zog heev pab tau kom khiav ceev. Emus yog omnivorous noog thiab lawv tuaj yeem muaj sia nyob yam tsis muaj zaub mov ntau tshaj li ob peb lub lis piam. Lawv cov txheej txheem digestion ntawm cov zaub mov yog yooj yim los ntawm tus cwj pwm nthuav, uas yog lawv noj hlau, iav shards, thiab pob zeb los pab cov zaub mov kom squash hauv lawv lub plab. Lawv muaj peev xwm ua luam dej thaum dej nyab lossis hla tus dej, tab sis haus dej me ntsis xwb. Feem ntau, emu txiv neej thiab poj niam zoo sib xws hauv qhov loj thiab zoo li, lawv nyob hauv cov cheeb tsam loj thiab tuab heev, tab sis lawv taug kev hauv cov khub niam txiv. Txawm li cas los xij, emu lub neej ntev yog 10 - 20 xyoo nyob rau hauv qus.
Rhea
Rhea yog tib tus tswv cuab ntawm Kev Txiav Txim: Rheiformes, thiab nyob tshwj xeeb hauv South America. Muaj ob hom ntawm lawv nrog yim subspecies. Ntau dua rhea, Rhea Americana nyob rau hauv nruab nrab thiab Eastern South America (feem ntau Brazil) thiab tsawg dua rhea (R. pennata) nyob rau yav qab teb thiab sab hnub poob teb chaws (tsuas yog Argentina thiab Chilli). Lawv plumage yog grey mus rau xim av thiab muaj lub caj dab ntev. Lawv lub cev ntev yog li 1.5 meters thiab lawv lub cev hnyav uas qhov nruab nrab ntawm 40 kilograms. Rhas khaws lawv cov tis loj kis thaum khiav, thiab lawv tuaj yeem ceev txog 60 km ib teev. Lawv ob txhais ceg muaj zog thiab cov ntiv taw taw rau pem hauv ntej yog qhov tseem ceeb rau lawv kom khiav ceev hauv av. Feem ntau, lawv yog cov noog uas ntsiag to, tab sis yog tias provoked lawv tuaj yeem tua thiab ua phem rau leej twg los ntawm lawv cov ncaws pob muaj zog. Rheas yog omnivores thiab nyiam txiv hmab txiv ntoo, cov hauv paus hniav, thiab cov noob nrog rau cov tsiaj me thiab qee zaum lawv yog carrion feeders. Lawv yog cov neeg zej zog thiab lawv cov pab pawg tau loj dua los ntawm 10 mus rau 100 tus tswv cuab hauv txhua lub caij ua ntej yug me nyuam. Txawm li cas los xij, cov pab pawg tawg feem ntau ua khub niam txiv lossis ua pab pawg me thaum lub caij sib tw. Cov txiv neej yog polygamous, khaws ob mus rau peb tus poj niam rau mating. Tom qab lawv sib yuav, txiv neej tsim lawv lub zes thiab tag nrho cov poj niam nteg qe rau nws. Tom qab ntawd, cov txiv neej incubate qe, thiab qee zaum nws siv lwm tus txiv neej subordinate los incubate qe. Rheas paub tias nyob ntau tshaj 20 xyoo nyob rau hauv qus.
Qhov txawv ntawm Emu thiab Rhea
| Emu | Rhea | |
| thaj chaw faib khoom | Endemic to Australian mainland | Endemic to South America |
| Taxonomic ntau haiv neeg | Ib hom nrog peb subspecies | ob hom nrog yim subspecies |
| Lub cev hnyav | 55 kg | 40kg |
| Average height | 2 m | 1.75m |
| siab tshaj plaws | 50 km/h | 60 km/h |
| Neck | Shorer than rheas | Nyob ntev tshaj rheas |
| xim | Brown with white thaj | Grey rau xim av plumage |
| 10 - 20 xyoo nyob rau hauv qus | Ntau tshaj 20 xyoo feem ntau nyob hauv qus |
