Showing posts with label rainfall. Show all posts
Showing posts with label rainfall. Show all posts

Banded Stilts Water Bird Always Finds the Water

As soon as inland rain arrives at Australian lakes, the banded stilt water bird makes its presence felt as well. It somehow knows that the rains have started from several hundred miles away.  This useful ability determines their way of life.

They don't hang about long. Rainfall will be limited so they move on to the next fresh rains spot. Birds were tagged with satellite transmitters. One bird flew directly to a saline wetland 1,000 miles away in two days. Another bird got there four days later, but the destination for both was the same.

Banded stilts do not have to migrate for improved feeding conditions. Their inbuilt system allows them to always find water. Why don't other birds do this? Obviously, evolution is "hit-and-miss". Animals develop abilities purely by chance. This is why evolution is successful. Animals move into niches that line up with their attributes.
Science by Ty Buchanan
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The Climate Changes in 20-30 and 50-70 year Cycles

Climate change is not all one way. There are cycles. Research on coral areas has shown two cycles, 20-30 years and 50-70 year. The region tested is in the northern Pacific which has a strong influence on Asian Monsoons. The amount of rainfall can vary a lot.

In regard to Australia, the climate varies across the continent. Western Australia is usually out-of-kilter with the rest of Australia. When there are floods in the east there are droughts in the west.

The cycles were discovered by drilling out cores and examining the undersea strata with ultraviolet light, a process called Spectral Luminescence Scanning.

Findings have helped to clarify changes in the climate of Madagascar since 1950. Changes in rainfall and river run off have left their mark. Cycles can be traced as far back as 1708.
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Australian Blog