When gorillas are on the line, it’s up to us to answer the call! From Feb. 1 through April 30, the Zoo is looking to the community-at-large to help save gorillas by donating old or used cell phones to the Gorillas on the Line Cell Phone Challenge. Small electronics frequently contain a substance called coltan and 80 percent of the world's coltan supply is in the Democratic Republic of the Congo, also home to many gorillas. Mining for coltan threatens the habitats of gorillas, chimpanzees, okapi and other endangered species. When individuals donate used phones or other electronics, the coltan from those devices is re-used and reduces the need to mine for the compound in gorilla habitats. The global goal for Gorillas on the Line is to collect 20,000 devices in 2020! Schools, organizations, businesses and individuals are encouraged to collect as many cell phones and electronics as they can in support of gorilla conservation. These items can be dropped off for recycling in the Zoo’s guest experience office in the entry plaza.