How do animals see the world? British and Australian scientists have made software (软件) to show us how animals see things. People can load (上传) their own photos into the software. Then they can pick different filters (滤镜) to see how different animals, such as bees and sparrows (麻雀), would see the photos in real life. The software is available (可获得的) for free online. Both scientists and animal lovers can use it.