Svenson ungulu (Buteo swainsoni) nasa ne na tsarin Falconiformes.
Alamomin waje na Svenson ungulu.
Bakin buzu na Svenson yana da girman 56 cm, fikafikan fikafikan 117 zuwa 137. A cikin launi na plumage, siffofin siffofi biyu sun yi nasara. Weight - daga 820 zuwa 1700 grams. Halayen waje na namiji da mace iri ɗaya ne.
A cikin tsuntsaye masu haske mai haske, goshin fari ya bambanta da kusan launuka masu launin toka mai launin toka na wuyan wuya, baya da kuma mafi yawan jikin na sama. Duk fuka-fukan gashin kansu suna da wayewar kai. Whitearamin ƙaramin tabo yana ƙawata wuya. Fuka-fukai na firamare da na sakandare launin toka ne masu duhu tare da raɓaɓɓun raƙuman ratsi a ciki. Wutsiya mai haske launin toka tare da tushe fari.
Fuka-fukan fuka-fukan tsakiyar biyu suna da launin ruwan kasa kuma suna ɗauke da kewayon tabarau na launin toka mai haske, kazalika da ratsi goma na baƙar fata "baƙar fata". Chin da tsakiyar maƙogwaro farare ne. Wuri mai faɗi, mai launin shuɗi mai launin ja mai launin ruwan hoda ya rufe dukan kirji. Partsananan sassan jiki farare ne, wani lokaci tare da launin ruwan kasa, gefen da ba a cika inuwa a saman ba.
Taarfi tare da ƙananan ratsi na baƙar fata. Iris na ido launin ruwan kasa ne mai duhu. Kakin zuma da kusoshin bakin suna da launin rawaya. Bakin baki baki ne. Paws suna rawaya. Bakin buhunan Svenson mai duhu suna da launuka iri ɗaya irin na ungulu masu haske. Sauran jikin, har da kan, duhu ne, kusan baƙi ko baƙi-toka-toka. Dukkanin gashin fuka-fukai da gashin fika-fikai an banbanta su da ratsiyoyi daban-daban. Taarfi da zurfin ratsi mai duhu.
Dusky Swenson Buzzards tsuntsaye ne da ba safai ba, ban da Kalifoniya, inda suke kusan kashi ɗaya bisa uku. Hakanan akwai tsaka-tsakin lokaci mai launin ja wanda ƙananan sassan suna da manyan ratsi na launin ruwan kasa mai launin ruwan kasa ko launin ruwan kasa tare da ratsi mai yawa.
Brownasa mai launin ruwan kasa tare da wuraren duhu. Buuruwar svenson buzzards suna kama da tsuntsaye manya, amma suna da ɗigo da yawo mai yawa a babba da ƙananan jiki. Kirjin da gefuna baki ne masu ƙarfi. Matasa Svenson buzzards na duhu morph ana rarrabe su ta ƙananan wayewa akan babba. Bakin baki mai launin shuɗi ne ba tare da haske ba. Kakin zuma kore ne. Kirkin kirji don kore koren launin toka.
Gidajen Svenson ungulu.
Ana samun ungulu Svenson a cikin buɗaɗɗun sarari ko buɗe ido: hamada, manyan ciyawar ciyawa, a lokacin hunturu da kuma lokacin nest. A lokacin bazara, mai farauta mai fuka-fuki yana da fifikon yarda ga yankunan da ciyawa suka mamaye da bishiyoyi da yawa da ke keɓe, musamman saboda a irin waɗannan wuraren akwai ƙurara da kwari da yawa, waɗanda sune ainihin abinci.
A cikin Kalifoniya, Swenson Buzzard ya binciki yankunan noma inda ya sami kayan abinci sau 4 fiye da sauran wuraren da ke cikin gida. A cikin Colorado, ta mamaye kwari mafi yawa kuma, zuwa ƙarami, tsabtataccen ciyawa da ƙasar noma. Duk waɗannan yankuna suna da ɗan daji kaɗan kuma sun dace da gida. Tsuntsayen da ke bacci a Arewacin Amurka kusan koyaushe suna zaɓar ƙasar noma inda suke samun abinci cikin sauƙi. A lokacin hunturu, suna yawo daga wannan filin zuwa wancan, a hankali suna binciken shafukan yanar gizo suna ci gaba.
Rarraba ungulu Svenson.
Buzzards na Svenson suna da mahimmanci ga nahiyar Amurka. A cikin bazara da lokacin bazara, tsuntsayen gida a Arewacin Amurka, British Columbia zuwa California. An rarraba a Texas da arewacin Mexico (Sonora, Chihuahua da Durango). A cikin Great Plains, iyakar tana matakin Kansas, Nebraska, da kuma cikin garin Oklahoma. Lokacin sanyi na Swainson a Kudancin Amurka, galibi a cikin Pampas.
Fasali na halayyar ungulu ta Svenson.
Buzzards na Svenson tsuntsaye ne masu aure. A lokacin kiwo, tsuntsayen manya guda biyu suna nuna tashi mai ban sha'awa, a yayin da suke shawagi a kusa kusa da gida. Bizards na Svenson suna bayyana da'ira a cikin sama mai girman kilomita ɗaya da rabi. Da farko, duka tsuntsayen a hankali suna samun tsayin mita 90 kafin su fara shawagi a cikin madauwari, suna sake dawowa sau biyu a cikin da'irar. Jirgin zanga-zangar ya ƙare tare da dogon yanayin tafiya da sauka a cikin gida. Mace ta haɗu da namiji kuma al'adar saduwa ta ƙare.
Kiwo na Svenson ungulu.
Swainson buzzards tsuntsaye ne na yanki. A lokacin nestland, suna gasa tare da wasu tsuntsayen masu cin nama kamar su Buteo regalis don shafukan nest. Akasin haka, yayin ƙaura, suna da haƙuri sosai da kasancewar wasu nau'in tsuntsaye, suna kafa manyan ƙungiyoyi. Lokacin kiwo na Svenson buzzards zai fara ne a watan Maris ko Afrilu a wurare guda iri ɗaya kamar na shekarun da suka gabata.
Lokacin da wani tsohon gida ya lalace, wasu ungulu ne zasu gina sabo. Gidajen yawanci kanana ne kuma suna da nisan mita 5 ko 6 sama da ƙasa. Tsuntsaye sun fi son yin gida a kan spruce, pine dutse, mesquite, poplar, elm har ma da murtsunguwa. Gina ko gyara yana ɗaukar kwanaki 7 zuwa 15. Maza suna kawo ƙarin kayan aiki kuma suna aiki mafi wuya. Duk abokan haɗin suna layi gida-gida tare da koren rassa tare da ganye a ciki. Mace tana sanya farin kwai 1 - 4 tare da tazarar kwana 2. Mata masu ɗaukar hoto ne kawai na tsawon kwanaki 34 - 35, namiji yana ciyar da ita. Kawai wani lokacin mace tana barin kamawa, amma sai abokiyar zama ta kasance.
Buzzards na matasa Svenoson suna girma da sauri: suna iya barin gida a cikin kwanaki 33 - 37, suna yin jigilar su ta farko. A duk tsawon lokacin, yayin da samari tsuntsaye ke kula da shawagi, suna kusa da iyayensu kuma suna karɓar abinci daga gare su. Suna shirya jiragen sama na kusan wata guda, don su bar wuraren asalinsu da kansu a lokacin kaka.
Ciyar da ungulu ta Svenson.
Buzzards na Swainson suna cin abinci iri-iri. Tsuntsaye masu cin nama suna cin kwari, ƙananan dabbobi masu shayarwa da tsuntsaye. Dabbobi masu shayarwa sun hada da akasarin beraye, shrews, lagomorphs, squirrels da berayen. Yawancin menu sun ƙunshi dabbobi masu shayarwa - 52% na yawan abinci, 31% kwari, 17% tsuntsaye. Canjin kayan abinci yana canzawa tare da kakar.
Matsayin kiyayewa na Svenson ungulu.
A wasu yankuna, kamar California, buzzards na Swainson sun yi ƙasa matuka da ya sa ƙasa da 10% daga ainihin girmansu. Dalilin wannan raguwar yawan tsuntsayen na ganima shi ne amfani da magungunan kwari da manoma suka yi a Ajantina, wanda hakan ya yi sanadiyyar lalata a kalla tsuntsaye 20,000. Kimanin nau'i 40,000 zuwa 53,000 na Swainson buzzards suna rayuwa a cikin yanayi. IUCN ta rarraba Buzzard Swensonian a matsayin jinsin dake da barazanar barazanar yawa.
