Search: nightingale audio
Why: In Breakfast of Champions, p. 252:
The craze spread. Black people who had never been near the Keedsler mansion could imitate the Lyre Bird and the Willy Wagtail of Australia, the Golden Oriole of India, the Nightingale and the Chaffinch and the Wren and the Chiffchaff of England itself.Answer: Click here to hear the Thrush Nightingale (Luscinia luscinia).
Source: The Virtual Bird
The More You Know: The scientific name for the Wren is Troglodytes troglodytes. Weird. Troglodytes live in caves. Click here to hear the wren sing!