Okuphansi kuvela ezinyonini zasemanzini ezifana namahansi namadada, futhi izici eziyinhloko ezinquma ikhwalithi yayo umjikelezo wokuphakela kanye nendawo yokukhula kwezinyoni zasemanzini. Uma umjikelezo wokuphakela amahansi isikhathi eside, kulapho amahansi namadada evuthwa ngokwengeziwe, kuba kukhulu ukuya phansi, futhi kuyanda nobukhulu; ukwehla kwamahansi namadada emanzini anombala omuhle nokuhlanzeka okuphezulu; amahansi namadada akhula ezindaweni ezibandayo, ukuze avumelane nemvelo ekhulayo, phansi kukhulu. Futhi aminyene, isivuno futhi high.
Ngakho-ke, ukuze siqinisekise ukuthi sihlinzeka amakhasimende ngemikhiqizo ephansi yekhwalithi ephezulu, sifuna indawo efanelekayo ekhulayo yamahansi, amadada nezinyoni zasemanzini emhlabeni wonke ukuze kukhethwe abakhiqizi abasezingeni eliphezulu. Siyayikhathalela futhi siyayisekela inqubomgomo yokuvikela izilwane ohlelweni lokuqoqa phansi. Yonke imikhiqizo ephansi itholakala Ngesitifiketi esilandelwayo emhlabeni jikelele esilandelekayo, azikho izilwane ezizolinyazwa futhi zihlukunyezwe phakathi nokukhiqizwa nokucubungula ukwehla. Ngemuva kweminyaka eminingi yokuhlolwa okuqinile kanye nokungena kwabahlinzeki abaphansi, sisungule ubudlelwano besikhathi eside bokusebenzisana nabanye abakhiqizi abaphansi. Izindawo zokuqoqwa eziphansi zitholakala ePoland, eHungary, eRussia, e-Iceland, eJalimane naseChina.