-Delile
Amadada ayisethi yezinhlobo zezilwane zomndeni Anatidae. Zibonakala ngokukhala kwazo, esikwaziyo njengo "quack" odumile. Lezi zilwane zinezinyawo ezine-webbed futhi zine- imibala ehlukahlukene ezimpapheni zalo, ukuze sikwazi ukuthola okumhlophe ngokuphelele, nsundu kanti ezinye zinezindawo eziluhlaza okwesimaragidu. Ngaphandle kokungabaza, bayizilwane ezinhle nezihehayo.
Kungenzeka ukuthi ubabonile bebhukuda, bephumula, noma behamba ngokuthula epaki, noma kunjalo, Wake wazibuza ukuthi idada liyandiza noma cha? Kule ndatshana kaPeritoAnimal, sizokuqeda ukungabaza kwakho size sichaze namaqiniso athile ongeke uwageje, uwaqonde.
Izimpukane zedada?
Njengoba sesishilo, idada ngelomndeni Anatidae futhi, ikakhulukazi, kubulili U-Anas. Kulo mndeni singathola ezinye izinhlobo zezinyoni ezibonakala ngokuhlala izindawo zasemanzini, ukuze bakwazi ukuthuthukisa ngokugcwele futhi babone okwabo inkambiso yokufuduka.
Yebo, idada liyandiza. Wena amadada yizilwane ezindizayo, yingakho wonke amadada endiza futhi ekwazi ukuhamba amabanga amade futhi afinyelele ezindaweni eziphakeme kakhulu ukufinyelela lapho eya khona njalo ngonyaka. Kukhona cishe Izinhlobo ezingama-30 zamadada ezisatshalaliswa kulo lonke elaseMelika, e-Asia, eYurophu nase-Afrika. Ngokuya ngohlobo lwedada, zingadla imbewu, ulwelwe, izilimo eziyizigaxa, izinambuzane, izikelemu nama-crustaceans.
Ahamba kangakanani amadada?
Izinhlobo ezihlukene zamadada zibonakala ngokufuduka. Imvamisa zindiza amabanga amade ukuze zisuke ebusika zithole izindawo ezifudumele ukuzala kabusha. Ngayinye yalezi zinhlobo, ngakho-ke, ikwazi ukundiza ezindaweni eziphakeme ezihlukene, kuya ngezidingo ezifunwa ibanga okufanele zihambe ngalo kanye nokuguquguquka kwemizimba yabo.
Kukhona uhlobo lwedada endiza futhi ligqame phakathi kwazo zonke ezinye ukuphakama okumangalisayo elingakufinyelela. Yi- ukugqwala idada (i-trerruginous truss), inyoni ehlala e-Asia, eYurophu nase-Afrika. Ngesikhathi sehlobo, ihlala ezindaweni ezithile zase-Asia, eNyakatho Afrika naseMpumalanga Yurophu. Ngakolunye uhlangothi, ebusika ukhetha ukuzungeza uMfula iNayile kanye neNingizimu Asia.
Kunabantu abathile be-rust duck abachitha isikhathi sabo esiningi endaweni eseduze ne- Izintaba zaseHimalaya bese wehlela emazweni aseTibet lapho kufika isikhathi sokukhiqiza kabusha. Kubo, lapho kufika intwasahlobo kuyadingeka ukufinyelela ezindaweni eziphakeme ze- 6800 amamitha. Phakathi kwamadada, ayikho neyodwa endiza iphakeme njengalezi zinhlobo!
Leli qiniso latholakala ngenxa yocwaningo olwenziwe yiCentre for Ecology and Conservation e-University of Exeter. Ucwaningo, olwenziwe nguNicola Parr, luveze ukuthi iRufous Duck iyakwazi ukwenza lolu hambo ngokuvika iziqongo eziphakeme kakhulu nokuwela izigodi ezakha amaHimalaya, kepha lowo msebenzi usasalele kuzinhlobo zekhono lokufinyelela ezindaweni eziphakeme ngokumangazayo.
Kungani amadada endiza ku-V?
Wake walithola ithuba lokucabanga ngomhlambi wamadada endiza uzungeze? Uma kungenjalo, usuke wakubona ku-inthanethi noma kuthelevishini, futhi uqaphele ukuthi ngaso sonke isikhathi babonakala bewela isibhakabhaka esihlelwe ngendlela efanisa incwadi V. Kungani kwenzeka? Kunezizathu eziningana zokuthi kungani amadada endiza ku-V.
Esokuqala ukuthi, ngale ndlela, amadada akha iqembu konga amandla. Thanda? Umhlambi ngamunye unomholi, inyoni endala futhi enolwazi oluningi ekufudukeni, oqondisa eminye futhi, ngenhlanhla, thola ngamandla athe xaxa amagalelo omoya.
Kodwa-ke, ukuba khona kwabo ngaphambili kuvumela, nakho, ukunciphisa amandla lapho lonke iqembu lithinta khona imisinga yomoya. Ngokunjalo, uhlangothi olulodwa lwe-V luthola umoya omncane uma amadada ngakolunye uhlangothi ebhekana nemisinga.
Ngalolu hlelo, amadada anolwazi kakhulu bashintshane ngokuthatha indima yomholi, ukuze kuthi lapho inyoni eyodwa ikhathala, iye ekugcineni kokwakheka bese enye ithatha indawo yayo. Ngaphandle kwalokhu, lolu shintsho lwe- "shift" luvame ukuvela ohambweni lokubuyela emuva, okungukuthi, idada elilodwa liqondisa uhambo lokufuduka, kanti elinye liqondisa ukubuyela ekhaya.
Isizathu sesibili sokwamukela lokhu kwakhiwa no-V ukuthi, ngale ndlela, amadada angaba ukuxhumana phakathi komunye nomunye futhi uqiniseke ukuthi awekho amalungu eqembu alahlekile endleleni.
Bona amaqiniso amaningi amnandi ngamadada: idada njengesilwane esifuywayo
I-Swan fly?
Yebo, i-swan iyandiza. Wena ama-swans yizinyoni ezifana namadada, njengoba nazo zingezomndeni Anatidae. Lezi zilwane ezinemikhuba yasemanzini zisatshalaliswa ezindaweni ezahlukene eMelika, eYurophu nase-Asia. Yize izinhlobo eziningi ezikhona zine- izimpaphe ezimhlophe, kukhona nezinye ezithi izimpaphe zezimpaphe ezimnyama.
Njengamadada, ama-swans andiza futhi banemikhuba yokufuduka, njengoba bethuthela ezindaweni ezifudumele lapho kufika ubusika. Akungabazeki ukuthi ingenye yezilwane eziyi-10 ezinhle kakhulu emhlabeni.
