At least 19 elephants have died since June in a popular wildlife region of southern Kenya, with the local toll now reported at 20. Early tests have suggested cyanide poisoning from pesticides, but wildlife experts say the evidence does not fit all the symptoms they have observed.

Lying on the ground and kicking up a cloud of dust, the elephant slowly exhausted himself in futile attempts to stand, the latest potential victim of a still-mysterious ailment in…

Lying on the ground and kicking up a cloud of dust, the elephant slowly exhausted himself in futile attempts to stand, the latest potential victim of a still-mysterious ailment in…