From the site:
xeno-canto is a website dedicated to sharing bird sounds from all over the world. Whether you are a research scientist, a birder, or simply curious about a sound that you heard out your kitchen window, we invite you to listen, download, and explore the bird sound recordings in the collection.
But xeno-canto is more than just a collection of recordings. It is also a collaborative project. We invite you to share your own bird recordings, help identify mystery recordings, or share your expertise in the forums. Welcome!
One of my favorite birdsongs is the song of the wood thrush – check out the xeno-canto recordings at https://www.xeno-canto.org/species/Hylocichla-mustelina.