Banksy unveils rhino mural in London, eighth piece in eight days / Banksy unveils gorilla artwork at London Zoo--hours after his rhino was defaced / Banksy unveils new rhino art in an animal-themed collection / Horny rhino gets frisky with a Nissan: Banksy reveals eighth artwork in London animal series / Endangered black rhino returned to Kenyan conservancy / Endangered Sumatran baby rhino born / Second endangered Sumatran rhino born in Indonesia / A critically endangered Sumatran rhino named Delilah successfully gives birth in Indonesia / Critically endangered Sumatran rhino born in Indonesia