24/7 live audio stream from Stanford University's Jasper Ridge Biological Preserve in Northern California. The mic is near lake and woodland habitat. Birds and wildlife can be heard throughout the day. 

List of birds observed at Jasper Ridge by month, 1999 - present:
https://jrbp.stanford.edu/sites/default/files/jrbp_bird_checklist.pdf

Jasper Ridge Biological Preserve (JRBP) is located near Stanford University's campus in the eastern foothills of the Santa Cruz Mountains. The Preserve encompasses remarkable geologic, topographic, and biotic diversity within its 481 hectares (1,189 acres) and provides a natural laboratory for researchers from all over the world, educational experiences to students and docent-led visitors, and refuge to native plants and animals.

The careful management of the Preserve's ecosystems in as natural a state as possible allows scientists to quantify changes observed in similar ecosystems affected by a range of human impacts.

In addition to facilitating first-rate research, this highly accessible field station provides undergraduate educational experiences and plays an active role in educating the general public.

Trevor Hebert
https://twitter.com/JRWildlife

Photo: Red-winged blackbird by Caroline Lambert