Red-gangar nutse (Aythya ferina) na dangin agwagwa ne, ba da umarnin anseriformes. Sunaye na laƙabi na gida "krasnobash", "sivash" suna nuni da keɓaɓɓiyar launin launi na zoben duck mai jan kai.
Alamomin waje na nutsar da kai-ja.
Tsutsa mai jan kai yana da girman jiki kimanin cm 58, fuka-fukai tare da tsayi daga 72 zuwa 83 cm. Nauyi: daga 700 zuwa 1100 g.Wannan nau'in agwagwan yana da ɗan ɗan kaɗan fiye da mallard, tare da gajeren wutsiya, wanda bayansa ya juya sama yayin iyo. Jiki yana da danshi da gajeren wuya. Setafafun kafafuwa an saita su zuwa baya, wannan shine dalilin da yasa yanayin tsuntsaye tsaye yake da ƙarfi. Kudirin yana da kunkuntar farce kuma ya yi daidai da tsayin kai; yana fadada kadan a sama. Wutsiyar tana da gashin tsuntsu 14. Kafadu tare da dan kadan zagaye fi. Wuya da baki, wanda ke hadewa cikin goshi a hankali, yana haifar da kyakkyawan yanayin martabar wannan agwagin. Dukkanin jikin jikin da fuka-fukai ana rarrabe su da sifofin ɓoye launin toka.
Namiji a cikin kiwo yana da launin ruwan kasa mai duhu. Lissafin baƙar fata ne tare da layin toka mai haske mai haske. Iris ja ne. Bayan baya kusa da wutsiyar ya yi duhu; babba na sama da na ƙasa kuwa baƙi ne. Wutsiya baƙi ne, mai sheki. Bangarorin da na baya haske ne, launin toka toka, wanda zai iya bayyana kusan fari a cikin hasken rana. Bakin baki yana da launi. Paws suna da launin toka. A cikin tashi, fuka-fukan fuka-fukai masu launin toka da fuka-fuka masu launin toka a fuka-fukai suna bai wa tsuntsu “dusashe”, a bayyane. Mace tana da ruwan toka-ruwan toka-toka a tarnaƙi da baya. Kan yana rawaya-kasa-kasa. Kirjin yayi furfura. Kambi da wuya suna da launin ruwan kasa masu duhu. Ciki ba fari bane fari. Bakin sa launin toka-shuɗi ne. Launin ƙafafun yana daidai da na namiji. Iris na ido ja ne mai duhu. Dukkanin samari suna kama da mace baliga, amma launinsu ya zama mafi kyau, kuma layin kodadde a bayan idanu ya ɓace. Iris ɗin rawaya ne.
Saurari muryar nutsewar mai ja.
Gidan mazaunin jan agwagwa.
Red-head nutse yana rayuwa akan tabkuna tare da ruwa mai zurfin gaske a cikin muhallin zama tare da kaurin ciyayi da kuma isa zuwa garesu. Yawancin lokaci ana samunsu a cikin yankuna marasa ƙanƙan da kai, amma a Tibet suna hawa zuwa mita 2600. A lokacin ƙaura, suna tsayawa a bakin tabki da kuma raƙuman ruwa. Suna ciyarwa a tafkunan ruwa tare da ciyawar ruwa mai yawa. Ana kaurace wa tabkuna masu ƙyalƙyali tare da abinci mara kyau. Masu iri-iri masu jajaye suna zaune a fadama, koguna tare da kwanciyar hankali, tsofaffin ramuka tsakuwa tare da bankunan da aka rufe da reed. Suna ziyartar tafkunan ruwa na wucin gadi kuma, musamman, tafkunan ruwa.
Redhead duck yada.
Ruwa masu kan kai sun bazu a Eurasia zuwa Tekun Baikal. Tsarin ya hada da Gabas, Yammaci da Tsakiyar Turai. Ana samun tsuntsayen galibi a yankunan kudu maso gabashin Rasha, a Asiya ta Tsakiya, a yankin Yankin Volga da kuma a Tekun Caspian. Suna zaune ne a tafkunan Arewacin Caucasus, Krasnodar Territory, a cikin Transcaucasus. Lokacin da suke yawo, suna tsayawa a Siberia, yamma da yankunan tsakiyar yankin Turai na Rasha. Masu nunin jan hankali suna yin hunturu a yankunan kudu maso gabashin Tarayyar Rasha, a yankunan kudancin Turai, a Arewacin Afirka, da Gabashin Asiya.
Siffofin halayyar jan-baki.
Red-head-ruwa - tsuntsayen makaranta, suna ciyar da yawancin shekara cikin rukuni. Ana samun manyan ɗimbin yawa har zuwa tsuntsaye 500 a lokacin sanyi.
Manyan kungiyoyi 3000 na tsuntsaye ana lura dasu yayin molt.
Redheads galibi ana samunsu a cikin garke garke tare da sauran agwagwa. Ba sa cikin gaggawa da sauri don tashi sama idan akwai haɗari, amma sun gwammace kawai su nitse cikin ruwa don ɓoyewa daga bin su. Wannan ba abin mamaki bane, tunda don tashi daga saman ruwa, tsuntsaye suna buƙatar tusawa sosai da aiki tare da fikafikan su. Koyaya, da aka ɗebo daga tafkin, ana cire masu jan launi cikin sauri tare da miƙaƙƙiyar hanya, suna yin ƙara mai ƙarfi daga fikafikan su. Suna iyo da nutsuwa sosai. Saukowa a cikin ruwan agwagwa yana da zurfi ƙwarai da gaske cewa jelar ta kusan rabin tsayin ta ɓoye a cikin ruwa. A kan ƙasa, masu ja da ja suna motsi ba daɗi, suna ɗaga kirjinsu sama. Muryar tsuntsaye tana bushewa da kuwwa. A lokacin mulmulallen, masu jan-baki sun rasa gashinsu na farko kuma basa iya tashi, saboda haka suna jiran wani lokaci mara dadi tare da wasu nutso a wasu wurare masu nisa.
Sake haifuwa da agwagwar mai jan kai.
Lokacin kiwo yana daga watan Afrilu zuwa Yuni kuma wani lokacin daga baya a yankunan rarraba arewacin. Masu jan launi iri-iri sun riga sun zama nau'i-nau'i a cikin garken ƙaura da kuma nuna wasannin dabbar ta hanyar jima'i waɗanda kuma ana kiyaye su a wuraren nest. Mace guda tana shawagi a kan ruwa maza da yawa sun kewaye ta. Yana motsawa cikin da'irar, yana sauke bakar sa cikin ruwa, yana kwantawa da karfi. Maza suna jefa kawunansu kusan zuwa baya, kuma suna buɗe bakinsu sama. A lokaci guda, wuyan ya kumbura. Sannan kan ya dawo ba zato ba tsammani tare da miƙa wuya.
Wasannin wasan kwaikwayo suna tare da ƙananan bushe-bushe da sautunan daɗaɗa.
Bayan saduwa, namiji yakan tsaya kusa da gida, amma bai damu da zuriya ba. Gida yana cikin ciyayi na bakin teku, galibi a cikin raƙuman ruwa na kankara, a kan raƙuman ruwa ko tsakanin tsatson dajin bakin teku, ana layi da agwagwa ƙasa. Yawancin lokaci wannan rami ne kawai na yau da kullun a cikin ƙasa, wanda aka tsara ta gungu tsirrai. Gida yana da zurfin diamita na 20 - 40. Wasu ginannun an gina su zurfi har zuwa 36 cm, suna kama da sifofi na iyo kuma suna ci gaba da rhizomes na ruwa na reed. Wani lokaci ƙwai na farko ana kwantawa ta agwagwa a cikin tiren rigar ko ma cikin ruwa. Ana amfani da Reed, sedge, hatsi azaman kayan gini, sa'annan layin duhu mai duhu wanda ke kewaye da masonry daga ɓangarorin. Yayin da mace ba ta, fulawar ma ana ɗorawa a kai.
Mace na yin kwai 5 zuwa 12. Shiryawa yana ɗaukar kwanaki 27 ko 28. Ducklings ya kasance tare da mace na makonni 8.
Redhead agwagwa.
Nutse mai jaja-jaja suna cin abinci iri-iri, suna cin kusan duk abin da yazo cikin ruwa. Koyaya, sun fi son yawanci algae, tsaba, saiwoyi, ganye da kuma tsiron tsire-tsire na ruwa kamar su duckweed, pondweed, elodea. Yayinda ake ruwa, agwagwa kuma suna kama mollusks, crustaceans, tsutsotsi, leɓe, beetles, caddis larvae da chiromonids. Ducks suna samun abincinsu galibi da safe da yamma. Ruwa mai kai ja ya ɓace a ƙarƙashin ruwa bayan ɗan turawa kuma bai fito ba don sakan 13 - 16. Sun fi son ciyarwa a cikin tsaftataccen ruwa tsakanin mita 1 da 3.50, amma suna iya fantsama cikin ruwa mai ƙarancin gaske.
A watan Agusta, girma ducklings ci manyan chironomid larvae. A lokacin kaka, a jikin ruwa mai ruwan sanyi, masu jan-baki iri-iri suna tara kananan tsire-tsire na salicorniya da dabbar quinoa.
