Monkeys are sedated as they recover after a sterilization procedure carried out by the Department of National Parks due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva

A monkey is seen in a cage before a sterilization procedure by the Department of National Parks due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva

Monkeys are sedated as they recover after a sterilization procedure carried out by the Department of National Parks due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva

Department of National Parks personnel make an identification tattoo on a monkey's arm before a sterilization procedure due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva

Veterinarians get monkeys ready before a sterilization procedure by the Department of National Parks due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva

Monkeys are sedated as they recover after a sterilization procedure carried out by the Department of National Parks due to the increase of the macaques population in the urban area and the tourist spots of the city of Lopburi, in Thailand June 22, 2020. Picture taken June 22, 2020. Lopburi's monkey population has doubled to 6,000 in the last three years. REUTERS/Jorge Silva