Kowace shekara, a lokacin kiwo, ƙaura daga jan kadoji yana farawa ne a Tsibirin Kirsimeti, wanda yake kilomita 320 daga tsibirin Java. Wadannan halittu suna fitowa daga dazuzzuka wadanda suka mamaye kusan dukkan tsibirin, kuma suka matsa zuwa gabar teku don su sami damar ci gaba da irinsu.
Jajayen kadoji suna rayuwa ne a kan ƙasa kawai, kodayake kakanninsu sun fito daga teku, amma a yau kadoji na iya shaƙar iska kuma ba su da halin yin iyo ko kaɗan.
Hijira na jan kadoji - abun birgewa ne, saboda miliyoyin halittu, a watan Nuwamba, suna farawa lokaci guda suna matsawa zuwa gabar da ke wanke tsibirin Kirsimeti. Kodayake kadoji da kansu halittun duniya ne, amma tsutsarsu na ci gaba ne a cikin ruwa, saboda haka, haihuwar wadannan mutane ana faruwa ne a gabar tekun, inda, bayan hanyoyin saduwa, mace na tura dubban qwai zuwa gefen igiyar ruwa don igiyoyin da ke shigowa su kwashe su. Kwanaki 25, wannan shine tsawon lokacin da canzawar tayi zai zama karamin kaguwa, wanda dole ne ya fita da kansa zuwa gareshi.
Tabbas hanya hijira don jan kadoji ba ya faruwa a cikin cikakkiyar yanayin aminci, saboda hanyoyi suna wucewa, gami da hanyoyin da motoci suke bi, don haka ba kowa ya isa inda yake ba, amma a lokaci guda, hukumomi suna taimakawa wajen kiyaye yawan jama'a kuma a duk hanyoyin da ake akwai suna taimakawa ƙwarƙwara da yawa don cimma burinsu, gina shinge a ɓangarorin da kwanciya amintattun ramuka a ƙarƙashin hanya. Hakanan zaka iya samun alamun gargaɗi akan hanya ko ma shiga cikin yankin da aka toshe.
Amma ta yaya katako zai iya tafiya don yin irin wannan tazarar idan misali, babban mutum a cikin rayuwar yau da kullun baya iya motsawa koda na mintina 10 ne. Amsar wannan tambayar masana kimiyya ne suka gano ta waɗanda suka lura da ƙaura na tsawon shekaru, suka yi nazarin mahalarta kuma suka yanke shawarar cewa a lokacin zuwan kiwo mai zuwa, matakin wani sinadarin hormone a cikin jikin kadoji yana ƙaruwa, wanda ke da alhakin sauyawar jiki zuwa cikin yanayin tsinkaye, da barin kadoji su isa inda suke da kyau ta amfani makamashi.
