The Carolina Wren is noted for its loud song, popularly rendered as “teakettle-teakettle-teakettle”. This song is rather atypical among wrens. A given bird will typically sing several different songs. Only the male birds sing their loud song. The songs vary regionally, with birds in northern areas singing more slowly than those in southern areas. The Carolina Wren also has a series of calls, including a rapid series of descending notes in a similar timbre to its song, functioning as an alarm call, and a very harsh and loud scolding call made to threaten intruders. This little guy was responding to a bird call CD I was playing. I took this in my back yard in Rockaway, NJ USA. I used the Nikon D3100 and the 70-300mm zoom lens.