New in Wildlife Science: Monarch Migration, Rafting Iguanas, Echolocation What it might mean that monarchs are delaying fall migration, how iguanas made it from the Americas to Fiji and how bats conquer a ‘cocktail party nightmare’ By Laura Tangley Wildlife Science Sep 24, 2025 Monarchs Delay Fall Migration As the global climate heats up, some species are shifting the timing of seasonal events to keep pace—with animals breeding or migrating sooner and plants leafing out or flowering earlier.