SCIENCE AND INDUSTRY. 
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commercial value, they are well worth careful study and conservation. 
They have all the attributes of domestic animals, in that they are quiet, 
inoffensive, and easily handled. In our forest reservation, other things 
being equal, their food trees should be grown and shelter provided, 
for the limit to their numbers, apart from food supply, is hollows or 
cavities in which to retire into during the day, and if a certain number 
were taken every year much timbered land would become revenue 
producing. 
Kangaroos are grass-eaters, and, as such, are not of much use on 
land that can be used for sheep or cattle, but at the present time there 
are numbers on private properties and Government lands throughout 
the States. They are protected until numerous, when an open season 
is declared, and all and sundry killed off. If the land-owner were 
allowed to kill males of a certain size they would be prevented from 
becoming a nuisance, and the danger of total extermination eliminated. 
Kangaroos are fairly numerous in the vast unoccupied lands in the 
Central and Western districts, where they are kept in check by wild 
KOOKABURRAS (LAUGHING JACKASSES). 
dogs and professional shooters, but in the absence of any supervision 
it 1s possible that in times of drought, when they are concentrated on 
few sources of water supply, they may become extinct. 
Wallabies are in a different category, as they generally occupy 
rough scrub lands, where they are not easy to find, but they will 
travel long distances for certain foods, and can thus be made ‘to enter 
enclosures and trapped without injury. The usual method of procuring 7 
- wallabies is to set traps on their beaten paths in the scrub, or to shoot 
them. 
The immense economic value of our bird fauna is fairly well known, 
but more exact knowledge of the specific value of certain species is _ 
needed, also of bird enemies, and inquiry into the possibility of increas- 
ing the number that can live on pastoral and agricultural lands. At 
present, much is left to chance, and birds that are invaluable are left to 
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