Icarus initiative: Wildlife Observation from Space - YouTube
Martin Wikelski and his team at the Max Planck Institute for Ornithology are investigating the global migration of animals - initially focusing on small animals such as birds, bats and flying foxes. Tiny transmitters weighing less than five grams, attached to the animals, collect information about their migratory behaviour and transmit it to the ISS. From there, for example, bird migration can be observed globally. This film and our website explain how this works:
https://www.animal-sensors.mpg.de/en