The Australian Top 40...................Bird Songs

http://birdsinbackyards.net/feature/top-40-bird-songs.cfm

follow the link above for the bird songs

Top 40 bird songs


Pied Currawong

Our 'Top 40 Chart' lists the most curious or distinctive bird calls in urban areas (mostly around Sydney), based on common enquiries to the Australian Museum.

Why do birds make sound?

Many species of bird are more often heard than seen. Most birds have some kind of sound-making ability and they vocalise for a variety of reasons, including:

advertising territories
attracting a mate
deterring predators
making alarm calls
How do they do it?

Birds generate sounds from a structure called the 'syrinx', which is located at the junction of the two bronchi (air passages) in the respiratory tract (breathing organs). The syrinx is controlled by pairs of muscles. Generally, bird species with more muscle-pairs produce more complex calls. The songbirds, also know as passerines (of the order Passeriformes), possess between four and nine of these muscle pairs and make the longest and most elaborate calls.