Adventure Ausrama Blog

It is not known how many levels of vision there are: There could be billions. Every human being and animal for that matter sees the world differentially. It was believed that all people are the same. We are not. Shades of color can be divided into finer and finer degrees. At one end are the color blind. At the other are probably the most skilled painters. As we age, like taste our vision of the world fades. It is so gradual : we do not notice that the number of colors we see has diminished. Special glasses have been made to change shades of color into fine levels of black. gray and white. This works well in that color blind people have  got through the "Ishihara" detection test for this malady. It may be possible to improve perception of gray spectrum shades. Perhaps even detection of colors can be increased. This is for the future though. For now the new spectacles have had a great impact. Adult men have been brought to tears when the glasses are first put on

It's a tough time for the orange-bellie. This species of parrot is about to become extinct. It is estimated to have five years left to live. A few years ago there were 70 pairs. Now only 50 birds remain. The last species of bird to go extinct in Australia ceased its existence 70 years ago. For the most part, people don't seem to care. However, there are more close to extinction. A fight ensues to keep the orange-bellie alive. In 1984 the Orange-Bellied Parrot (OBP) Recovery Team was created to monitor and protect the bird. A protected breeding program was established in south-west Tasmania. Fifteen years of drought has seen the birds' supply of seeds dwindle to almost nothing. Water has been allocated for irrigation and piped away from the region. A last throw of the dice involves catching 10 pairs then breeding them in a caged area. This kind of action is unusual. It would be expected that eggs be taken from nests of wild birds, with hatching done in an incubator then

It's well known that fish living near coral are colored the same as Othe background for protection from predators. The Harlequin filefish (orange spotted filefish), Oxymonacanthus longirostris , goes to extremes to blend into the coral it lives in. The fish has a hook on the back of its head that it uses to hook onto coral so it can sleep in peace. The shape with the polka-dot blue and yellow spots on its body perfectly match the coral it lives in. Its fin is the same color as the coral's growing tip. It blends in so well predators just swim past them. When fish use shape and color to match background coral the system is called masquerading. Using color alone is called crypsis. Insects look like plants that they live in, but coral fish have perfected camouflage. http://www.adventure--australia.blogspot.com/ http://www.tysaustralia.blogspot.com/ http://www.feeds.feedburner.com/AdventureAustralia http://www.technorati.com/blogs/ http://adventure--australia.blo

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