I have a friend who says a Kookaburra laughing heralds a change in the weather. I am sure I have heard them laughing when no weather change was imminent. Is this because they do in fact laugh for other reasons, or is it they are just bad weather forcasters?
They only "laugh" for the same reasons as other birds; defending their territory,finding a mate,warning other birds about a predator,etc. - I doubt that they only laugh(or sing) when there is a change in the weather.
Nathan is absolutely spot on here,
The answer to your question about the Kookaburra singing before a weather change, is a complete myth. The laugh of the Kookaburra has nothing to do with weather patterns. The kookaburra's laugh is really a territorial call and a warning to others.That is also why they call (laugh) early in the morning, to establish their territory and to find out if all the others are still alive, or if there is a possibility to take over ,or fight for a new territory.
M-L