Bakha wakuda waku America (Anas rubripes) kapena American black mallard ndi am'banja la bakha, dongosolo la Anseriformes.
Kufalikira kwa bakha wakuda waku America
Bakha wakuda waku America amapezeka kumwera chakum'mawa kwa Manitoba, Minnesota. Malo okhalamo amayenda chakum'maŵa kudutsa zigawo za Wisconsin, Illinois, Ohio, Pennsylvania, Maryland, West Virginia, Virginia. Kuphatikiza madera okhala nkhalango ku Eastern Canada ku Northern Quebec ndi Northern Labrador. Mitundu ya bakha iyi imadutsa kumwera chakummwera kwawo komanso kumwera mpaka ku Gulf Coast, Florida ndi Bermuda.
Malo okhala bakha wakuda waku America
Bakha wakuda waku America amakonda kukhala m'malo osiyanasiyana amadzi abwino komanso amchere omwe amakhala m'nkhalango. Amakhala m'madambo okhala ndi ma acidic ndi zamchere, komanso nyanja, mayiwe ndi ngalande pafupi ndi mundawo. Kugawidwa m'malo ndi malo osungira madzi. Amakonda madera ochezeka, omwe amaphatikizira malo amchere amchere okhala ndi malo oyandikira kwambiri azolimo.
Kunja kwa nyengo yoswana, mbalame zimasonkhana m'madziwe otseguka, pagombe, ngakhale kunyanja. Abakha akuda aku America mwina amasamuka. Mbalame zina zimakhala ku Nyanja Yaikulu chaka chonse.
M'nyengo yozizira, anthu akumpoto kwambiri bakha wakuda waku America amasunthira kutsetsereka pagombe la Atlantic ku North America ndikusunthira kumwera kwambiri ku Texas. Anthu ena amapezeka ku Puerto Rico, Korea ndi Western Europe, komwe ena amapeza malo okhala kwanthawi yayitali.
Zizindikiro zakunja kwa bakha wakuda waku America
Bakha wamwamuna wakuda waku America yemwe ali ndi nthenga zoswana ali ndi malo pamutu wokhala ndi mizere yolimba yakuda, makamaka m'maso ndi pamphumi. Mbali yakumtunda, kuphatikiza mchira ndi mapiko, ndi bulauni yakuda.
Nthenga zomwe zili pansipa ndi zakuda, zakuda-bulauni zokhala ndi mphako zotuwa. Nthenga zachiwiri zouluka zimakhala ndi "kalilole" wamtambo wabuluu wokhala ndi mzere wakuda m'malire ndi nsonga yoyera yopapatiza. Nthenga zouluka zakuthambo ndizonyezimira, zakuda, koma nthenga zonsezo ndi zakuda kapena zofiirira, ndipo pansi pake ndi poyera.
Iris ya diso ndi yofiirira.
Mlomo ndi wachikasu wobiriwira kapena wachikaso chowala, ndi ma marigolds akuda. Miyendo ndi yofiira lalanje. Mkaziyo ali ndi mlomo wobiriwira wobiriwira kapena wa azitona wokhala ndi malo akuda pang'ono. Miyendo ndi miyendo ndi ya bulauni-azitona.
Mtundu wa nthenga za mbalame zazing'ono umafanana ndi nthenga za akuluakulu, koma umasiyana m'malo ambiri, azitali zazitali pachifuwa ndi pansi pamthupi. Nthenga zimakhala ndi m'mbali, koma zakuda kuposa nsonga. Pothawa, bakha wakuda waku America amawoneka ngati mallard. Koma imawoneka yakuda, pafupifupi yakuda, mapikowo ndi odziwika kwambiri, omwe ndi osiyana ndi nthenga zonse.
Kuswana Bakha Wakuda waku America
Kuswana mu bakha wakuda waku America kumayamba mu Marichi-Epulo. Mbalame nthawi zambiri zimabwerera kumalo awo akale, ndipo nthawi zambiri ndimagwiritsa ntchito zisa zakale kapena kukonza chisa chatsopano mita 100 kuchokera wakale. Chisa chimakhala pansi ndipo chimabisidwa pakati pa zomera, nthawi zina mchimbudzi kapena ngalande pakati pa miyala.
Clutch imakhala ndi mazira obiriwira obiriwira 6-10.
Iwo waikamo chisa pa intervals mmodzi patsiku. Zazikazi zazing'ono zimaikira mazira ochepa. Pa nthawi yokwanira, yaimuna imakhala pafupi ndi chisa pafupifupi milungu iwiri. Koma kutenga nawo gawo pakubereka ana sikunakhazikitsidwe. Makulitsidwe amatha pafupifupi masiku 27. Nthawi zambiri, mazira ndi anapiye amagwidwa ndi akhwangwala ndi ma raccoon. Ana oyamba amapezeka koyambirira kwa Meyi, ndipo amatulutsa nsonga koyambirira kwa Juni. Ankhamba amatha kale kutsatira bakha mu maola 1-3. Mkazi amatsogolera ana ake kwa milungu 6-7.
Makhalidwe a bakha wakuda waku America
Kunja kwa nyengo yoswana, abakha akuda aku America ndi mbalame zokonda kucheza kwambiri. M'dzinja ndi masika, amapanga gulu la mbalame chikwi kapena kuposerapo. Komabe, kumapeto kwa Seputembala, mapangidwe awiriawiri amapezeka, gululo limayamba kuchepa ndipo pang'onopang'ono limachepa. Pawiri amapangidwira nyengo yoswana yokha ndipo amakhala miyezi ingapo. Pachimake paubwenzi wankhanza zimachitika pakati pa nthawi yozizira, ndipo mu Epulo, pafupifupi akazi onse amakhala ndiubwenzi wopangidwa ndi awiri.
Bakha wakuda waku America akudya
Abakha akuda aku America amadya mbewu ndi magawo azomera zam'madzi. Mu zakudya, zamoyo zopanda mafupa zimakhala zochuluka kwambiri:
- tizilombo,
- nkhono,
- crustaceans, makamaka masika ndi chilimwe.
Mbalame zimadya m'madzi osaya, zimangoyang'ana pansi pamatope ndi milomo yawo, kapena kutembenuka mozondoka poyesa kutenga nyama. Amayenda pansi pamadzi nthawi ndi nthawi.
American Black Bakha - Cholinga cha Masewerawo
American Black Bakha wakhala msaka wofunikira kwambiri wa mbalame zam'madzi ku North America kwanthawi yayitali.
Kuteteza kwa bakha wakuda waku America
Chiwerengero cha abakha akuda aku America mzaka za m'ma 1950 chinali pafupifupi 2 miliyoni, koma kuchuluka kwa mbalame kwakhala kukucheperachepera kuyambira pamenepo. Pakadali pano, pafupifupi a 50,000 amakhala m'chilengedwe. Zifukwa zakuchepa kwa manambala sizikudziwika, koma njirayi ndiyotheka chifukwa chakuchepa kwa malo okhala, kuwonongeka kwa madzi ndi chakudya, kusaka mwamphamvu, kupikisana ndi mitundu ina ya abakha ndi kusakanizidwa ndi ma mallards.
Maonekedwe a anthu a haibridi amabweretsa mavuto ena pakubereketsa kwa mitunduyo ndipo zimabweretsa kuchepa kwa bakha wakuda waku America.
Akazi osakanizidwa sakhala othandiza, omwe pamapeto pake amakhudza kuswana kwa ana. Ma hybrids samasiyana konse ndi mbalame zosakanizidwa, kuphatikiza apo, kafukufuku wasonyeza kuti ma hybrids achikazi nthawi zambiri amafa asanakhale ndi nthawi yobereka. Izi zitha kuwonetsedwa bwino pamitanda yolunjika yochokera ku bakha wakuda waku America kupita ku mallard.
Chifukwa cha kusankha kwachilengedwe, ma mallard ambiri apanga mawonekedwe osinthika azikhalidwe. Chifukwa chake, anthu ochepa a American Black Duck amakumananso ndi zina zakubadwa. Pakadali pano, ndikofunikira kupewa zolakwika pakuzindikiritsa mitundu.
