Jim Nyamu, a wildlife biologist in Kenya who is walking from Massachusetts to Washington, D.C. to raise awareness about the ivory trade and how it could lead to the decimation of elephant populations, will give a presentation at 7 p.m. on Thursday, Aug. 29 in Quigley Hall 101. His talk is titled “Conserving African Elephants Through Walking and Talking.” Billed as the “Noble USA Walk,” Nyamu’s journey will cover 33 days and 560 miles, ending on October 4 during the International March for Elephants, when supporters will march in 15 cities around the world. The walk is part of a global appeal to people who care about elephants and conservation. The Ivory Belongs to Elephants campaign sets out to establish and support Community-Based Conservation Programs (CBCP), which have demonstrated the potential to conserve wildlife outside protected areas. The Noble USA Walk will begin on Sept. 4 from Cape Cod to New York, making stops in New Haven, Philadelphia and Baltimore. It will end in Washington, D.C. on Oct. 4 during the International March for Elephants, organized by the David Sheldrick Wildlife Trust.