The World Wildlife Day marked annually on March 3 to raise the awareness on the wildlife is celebrated under the theme "Recovering key species for ecosystem restoration" this year.
Two elephants were killed after being hit by a train in Morigaon district of India's northeastern state of Assam, a Northeast Frontier Railway (NFR) spokesperson said.
A hefty set of tusks is usually an advantage for elephants, allowing them to dig for water, strip bark for food and joust with other elephants. But during episodes of intense ivory poaching, those big incisors become a liability.