Palestinian Yousif Nassar checks a Palestinian partridge egg at his house in the West Bank city of Hebron, June 7, 2020. Nassar, 50, has collected eggs of the Palestinian partridge from private farms and put them in incubators. He will release the birds when they become able to fly. Nassar has been doing this as a self-initiative to keep the Palestinian partridges from extinction. (Photo by Mamoun Wazwaz/Xinhua)

Palestinian Yousif Nassar shows Palestinian partridge chicks in an incubator at his house in the West Bank city of Hebron, June 7, 2020. Nassar, 50, has collected eggs of the Palestinian partridge from private farms and put them in incubators. He will release the birds when they become able to fly. Nassar has been doing this as a self-initiative to keep the Palestinian partridges from extinction. (Photo by Mamoun Wazwaz/Xinhua)

Palestinian Yousif Nassar checks a Palestinian partridge chick at his house in the West Bank city of Hebron, June 7, 2020. Nassar, 50, has collected eggs of the Palestinian partridge from private farms and put them in incubators. He will release the birds when they become able to fly. Nassar has been doing this as a self-initiative to keep the Palestinian partridges from extinction. (Photo by Mamoun Wazwaz/Xinhua)