Glossary Species Home
Connecticut Warbler Oporornis agilis
Flight call description An abrupt, buzzy, slightly rising "dzik".
Fig.1. New Jersey September 11,1998 (MO).
Bird in flight.
Similar species Very similar to Yellow and Blackpoll Warblers but typically shorter, higher, and sharper. See Cerulean Warbler and zeep calls.
Behavior Primarily a nocturnal migrant but engages in redetermined migration and limited resumed migration. Gives flight call regularly while perched and in flight during the day. Presumably calls during nocturnal migration.
Spectrographic description Measured calls (N=8) were 32.2-62.8 (48.3) mS in duration and in the 6.1-9.2 (6.8-8.5) kHz frequency range. The frequency track was single-banded and usually slightly rising. It was modulated with 2-4.5 (3) humps with a spacing of 12.4-13.4 (13) mS and a depth of 1-1.5 (1.2) kHz. Modulation troughs were evenly v-shaped, and peaks were sharp-cornered giving a sharp zig-zag appearance.