Bellingen area: The acoustic ecology of native bird extinction and the sound of “cock-a-doodle-doo”

24.7.15

The acoustic ecology of native bird extinction and the sound of “cock-a-doodle-doo”

For eons the Laughing Kookaburra has been announcing the break of dawn for eastern Australia. The loud 'koo-koo-koo-koo-koo-kaa-kaa-kaa' is often heard in a chorus. The bird is one of the larger members of the kingfisher family and lives in one place for most of its life. It also mates for life.

The more settlers convert bio-diverse landscapes into mono-culture and populate it with alien species, the ecology changes into an artifact. The soundscape too takes on the characteristic of a noise composition.

Now the highest-ranking rooster has priority to announce the break of dawn. The (overseas) circadian clock of the domesticated fowl often is set off long before dawn. They do not sing in a chorus but in a strict hierarchical pattern. The sound of “cock-a-doodle-doo” echos over the dark valleys. Barking dogs and cars complete the early morning cacophony.

Non-native species and fossil fuel combustion machines constitute the ambient soundscape that announces the break of dawn of more industrial activity. The bird chorus of kookaburras and other common native birds fades as the environmental noise increases.

Deforestation and land clearing robs Kookaburras (and other Australian wildlife) of their homes which they need for nesting, roosting and perching to catch snakes and mice. The generously splashed pesticides poison the insects that the birds eat.