A child jumps to touch lanterns hung on a tree ahead of the Chinese Lunar New Year celebrations in Beijing on Thursday, January 16, 2020. The world's largest annual migration begins this week in China with millions of Chinese traveling to their hometowns to celebrate the Lunar New Year on Jan. 25 this year which marks the Year of the Rat on the Chinese zodiac. (Photo by Ng Han Guan/AP Photo)

In this Tuesday July 12, 2016 photo, an elephant is lifted by a crane in an upside down position in Lilongwe, Malawi, in the first step of an assisted migration of 500 of the threatened species. African Parks, which manages three Malawian reserves is moving the 500 elephants from Liwonde National Park, this month and next, and again next year when vehicles can maneuver on the rugged terrain during Southern Africa's dry winter. (Photo by Tsvangirayi Mukwazhi/AP Photo)

A cat and a dog stray along a side street in Las Pinas city, Metro Manila, Philippines, 02 July 2023. A significant number of dogs and cats left wandering in streets could lead to potential health hazard due to rabies. Amidst Covid-19 pandemic, displaced pet owners who lost their job because their employers closed or lost business were forced to leave their animals in the city as they migrate elsewhere. (Photo by Francis R. Malasig/EPA)

A Palestinian girl is seen inside the giant jerry can filled with water as displaced Palestinians, sheltering in tents they have set up in schools and along roadsides, experience the increasing temperatures in Deir al-Balah, Gaza, on June 11, 2024. Especially children are the most affected by the extremely hot weather conditions, while the number of Palestinians migrating to Deir al-Balah is increasing day by day due to Israeli attacks on different parts of Gaza. (Photo by Hasan Jedi/Anadolu via Getty Images)

A monarch butterfly rests on a visitor's hand at the Monarch Grove Sanctuary in Pacific Grove, California December 30, 2014. Monarch butterflies may warrant U.S. Endangered Species Act protection because of farm-related habitat loss blamed for sharp declines in cross-country migrations of the orange-and-black insects, the U.S. Fish and Wildlife Service said. (Photo by Michael Fiala/Reuters)

Among the fish populations that could be harmed by the Xayaburi dam in Laos is the critically endangered Mekong giant catfish, considered by the Guinness Book of World Records to be the world’s largest freshwater fish. The fish, which grows to 650 pounds and about 10 feet long, is only found in the Mekong River. It is migratory, moving between downstream habitats in Cambodia upstream to northern Thailand and Laos each year to spawn. Some experts fear the Xayaburi dam could block the migration and drive the giant catfish to extinction. (Photo by Courtesy of Zeb Hogan/University of Nevada, Reno)

An Indian nomadic shepherd from the western Rajasthan state guides his flock of sheep through an access road in Greater Noida, outskirts of New Delhi, India, Tuesday, December 5, 2017. Looking for suitable pasture lands for grazing, shepherds migrate their flocks over extensive areas in the same state or to neighboring states in India. (Photo by R.S. Iyer/AP Photo)

In this handout image provided by Parks Australia, thousands of red crabs are seen walking in a drain on November 23, 2021 in Christmas Island. The annual migration of red crabs begins with first rains of the wet season on Christmas Island, usually around October or November. Millions of the red crabs make their way across the island to the ocean to mate and spawn. (Photo by Parks Australia via Getty Images)