Even as the National Zoological Park continues to remain shut for visitors during the pandemic, over 400 painted storks have migrated to Delhi. The number could cross 500 as officials are expecting more birds to fly down in the next couple of weeks. Though the zoo is known for animals in captivity, painted storks have been making their way there for decades. Painted storks are waders and catch fishes and insects in shallow water. The artificial waterbodies at Deli Zoo have fishes, but workers add 40kg of two-inch fishes in the ponds daily to ensure a proper diet to the large congregation of birds.