[1][3] There are indications that the elephant population is expanding at a rate of 4-5% per annum,[2] however there is concern that poaching remains a significant threat, with 2011 the worst year on record since the Ivory Trade Ban.
[3] In addition, numbers of the critically endangered Hirola and endangered Grevy's zebra have been introduced due to difficulty in offering the species protection in their native habitats.
Although underpasses for wildlife have were built as part of the construction of the SGR, radio-collaring evidence showed that the movement of elephants between the two Tsavo East and Tsavo West National Park has been greatly curtailed.
[4] Wildlife movement between the two National Parks will be further impeded by the construction of the proposed Nairobi Expressway.
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