For a safari which lens??

Is mostly bush - shrubs/trees etc.

Not the same as the savannahs of Tanzania and the Mara.

Excessive focal length is not necessary and unadvisable unless the interest is bird photography - especially as the game drives in private parks are by 4X4 and the ranger will get you up close(ish).

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AJ
Carpe diem quam minimum credula postero