Wildebeest and zebra movement from TNP to Lake Natron has been confirmed by radio collaring and tracking of individual animals. It is likely that giraffe and eland also use this route. The first stage of the corridor between TNP and Manyara Ranch is heavily used by elephant, wildebeest, zebra and there is also migration of giraffe, buffalo and eland.
The most immediate threat is increasing cultivation in the 4 km strip of land between TNP and Manyara Ranch. There is also an increasing threat from cultivation where the corridor crosses the Makuyuni – Mto-wa-Mbu road and along the lower slopes of Lolsimongori. The land further north near Lake Natron is too arid for cultivation. However plans to tarmac the road to Loliondo via Natron are likely to negatively impact wildlife movement.