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Yellow-vented bulbuls are seen at a park in Manila, the Philippines, June 5, 2021. Saturday marks this year's World Environment Day with the theme of "Ecosystem Restoration". (Xinhua/Rouelle Umali)
Yellow-vented bulbuls are seen at a park in Manila, the Philippines, June 5, 2021. Saturday marks this year's World Environment Day with the theme of "Ecosystem Restoration". (Xinhua/Rouelle Umali)