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To check whether Zoologist is a skill in Demand across Australia you can review the State Sponsorship List of various Australian States/Territories:
Australian Capital Territory http://www.business.act.gov.au/skilled_and_business_migration
New South Wales http://www.business.nsw.gov.au/live-and-work-in-nsw/visa-and-migration
Northern Territory http://www.migration.nt.gov.au/
Queensland http://www.workliveplay.qld.gov.au
South Australia https://www.migration.sa.gov.au/
Tasmania http://www.migration.tas.gov.au/
Victoria http://www.liveinvictoria.vic.gov.au
Western Australia http://www.migration.wa.gov.au
