Wild Sanctuary is a great resource that allows users to listen to the "sounds of nature" as recorded around the world. Wild Sanctuary offers Google Earth and Google Maps files of placemarks containing audio recordings from around the world. Each placemark features a recording of the sounds of nature (birds, waves, rivers, mammals, etc.) made at that location.
Applications for Education
Wild Sanctuary's "sounds of nature" maps are great examples of how Google Maps or Google Earth can be used in a science class. In the lower grades Wild Sanctuary's maps are good resources for students to explore on their own. In the upper grades Wild Sanctuary's maps are a good model for students to use in creating their own maps. A fun project that would get students outside of the classroom and get them using technology would be to have students make recordings of their local environment and include those recordings on placemarks on their own maps.
Google Earth Across the Curriculum
Free 33 Page Guide - Google for Teachers
Using Maps in an Elementary School Math Lesson