A malnourished lion walks inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. Conservationists in Sudan are trying to save four lions they say have been underfed and neglected in a wildlife park in the capital Khartoum, after one lion died earlier this week. REUTERS/Mohamed Nureldin Abdallah

A malnourished lion walks inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. The lions are now being treated after a plea from the Sudan Wildlife Research Centre and an online campaign pointing out their plight. REUTERS/Mohamed Nureldin Abdallah

Workers assist a wildlife veterinarian as he takes samples from a malnourished lion inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. The emaciated lions belong to an important subspecies that exists only in limited areas including southeast Sudan and neighbouring Ethiopia, said Khalda Seliman Mahgoub of the Sudan Wildlife Research Centre. REUTERS/Mohamed Nureldin Abdallah

A malnourished lion stands inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. Al-Qureshi park receives few tourists and little revenue. Sudan has suffered decades of internal conflict and international isolation, and was rocked by months of protests and a political uprising last year. REUTERS/Mohamed Nureldin Abdallah

A malnourished lion drinks water from a pipe inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. REUTERS/Mohamed Nureldin Abdallah

A malnourished lion rests inside its cage at the Al-Qureshi Park in Khartoum, Sudan January 22, 2020. REUTERS/Mohamed Nureldin Abdallah