Rakumin dawa dabba ce mai ban mamaki, kyakkyawa sosai, tare da siraran kafafu da doguwar wuya. Ya bambanta da sauran wakilan duniyar dabbobi, musamman tsayinsa, wanda zai iya wuce mita biyar... shi dabba mafi tsayi a tsakanin waɗanda ke zaune a ƙasa. Dogon wuyanta shine rabin tsayin jikin duka.
Sha'awar raƙumin daji ya taso tsakanin yara da manya, me yasa yake buƙatar irin waɗannan dogayen ƙafa da wuya. Wataƙila za a sami 'yan tambayoyi kaɗan idan dabbobi masu irin wannan wuyan sun fi yawa a cikin dabbobin duniyarmu.
Amma rakumin dawa suna da wasu siffofin tsarin da suka sha bamban da sauran dabbobi. Dogon wuya ya kunshi kashin baya guda bakwai, daidai adadinsu a cikin kowace dabba, amma suransu na musamman ne, suna da tsayi sosai. Saboda wannan, wuyan ba mai sassauci bane.
Zuciya babba ce, domin aikinta shine samar da dukkan sassan jiki da jini, kuma don jinin ya isa ga kwakwalwa, dole ne a ɗaga shi da mita 2.5. Ruwan jini rakumin dawa kusan ninki biyufiye da sauran dabbobi.
Huhu na rakumin dawa kuma babba ne, kusan sau takwas ya fi girma... Aikinsu shi ne narkar da iska tare da doguwar hanyar iska, ƙimar numfashi ta ragu da ta mutum. Kuma kan rakumin daji kadan ne.
Abin sha'awa, rakumin dawa yakan yi barci galibi yayin tsaye, kawunansu yana kwance akan maƙogwaron. Wasu lokuta rakumin dawa sukan yi barci a ƙasa don huta ƙafafunsu. A lokaci guda, yana da matukar wahala a gare su su sami wuri don dogon wuya.
Masana kimiyya sun danganta kebantaccen tsarin rakumin dawa da abinci mai gina jiki, wanda ya dogara da samari da ganye, da ganyayen bishiyoyi. Itatuwa suna da tsayi sosai. Irin wannan abincin yana ba ka damar rayuwa cikin yanayi mai zafi, inda akwai dabbobi da yawa da ke ciyar da ciyawa, kuma a lokacin rani, savannah ya ƙone gaba ɗaya. Don haka ya zama cewa raƙuman dawa suna cikin yanayi mafi dacewa.
Acacia shine abincin da aka fi so da raƙuman daji.... Dabbar ta hadu da reshe da harshenta sannan ta jawo shi zuwa bakinta, suna diban ganye da furanni. Tsarin harshe da leɓe na da cewa rakumin dawa ba zai iya lalata su ba a kan kashin baya na Acacia. Hanyar ciyarwar tana ɗaukar sa'o'i goma sha shida ko fiye a rana, kuma yawan abincin ya kai kilo 30. Rakumin dajin yakan yi awa daya kawai.
Dogon wuya ma matsala ce. Misali, don kawai shan ruwa, rakumin dawa ya shimfida ƙafafu ko'ina kuma ya tanƙwara. Matsayin yana da matukar rauni kuma rakumin daji zai iya zama ganima ga masu farauta a irin wannan lokacin. Rakumin dawa zai iya shafe tsawon mako ba tare da ruwa ba, yana kashe kishirwa tare da ruwan dake cikin kananan ganyen. Amma idan ya sha, to yana shan lita 38 na ruwa.
Tun daga zamanin Darwin, an yi amannar cewa wuyan rakumin dawa ya sami girmansa sakamakon juyin halitta, cewa rakumin dawa a zamanin da ba shi da irin wannan kwalliyar marmari. Dangane da ka'ida, a lokacin fari, dabbobi masu doguwar wuya sun rayu, kuma sun gaji wannan fasalin ga zuriyarsu. Darwin yayi gardama cewa duk dabba mai kafa hudu zai iya zama rakumin dawa. Bayani mai ma'ana cikin tsarin ka'idar juyin halitta. Amma ana bukatar shaidar burbushin halittu don tabbatar dashi.
Masana kimiyya da masu bincike su nemo nau'ikan canjin yanayi daban-daban. Koyaya, burbushin magabatan raƙuman dawa na yau basu da bambanci da waɗanda suke rayuwa a yau. Kuma ba a samu siffofin miƙa mulki daga gajeren wuya zuwa doguwa ba har yanzu.
