As others have said, dehydration is your probably your biggest risk. Access to fresh water can be challenge, especially in summer. Depending on where you are,

As others have said, dehydration is your probably your biggest risk. Access to fresh water can be challenge, especially in summer. Depending on where you are, exposure would be the next biggest risk (many hikers get into trouble in the Stirling Ranges when they underestimate how cold it can get). When you are hiking, you generally make enough noise/vibration to warn snakes of your approach. They will usually get out of the way. There is more risk if the temperature is still a bit cool. Snakes will then be sluggish, won't have moved away and may get startled. Wear gaiters it you are concerned and you'll be pretty well protected. At certain times of the year, male kangaroos can get a bit obstreperous. It is rare though for one to get aggressive unless frightened or provoked. As with hiking trails elsewhere in the world, keep your food well sealed. This is minimise the risk of mice or quolls eating through your pack to get to the food. If you are interested in hiking the South West of Australia check out the Bibbulmun track: https://www.bibbulmuntrack.org.au/ https://www.bibbulmuntrack.org.au/ Which meanders for ~1000km from Perth (state capital of Western Australia) to Albany. It passes through or close to many towns, so you can resupply relatively often. There is also a MTB trail, the Munda Biddi, that follows a similar route: https://www.mundabiddi.org.au/ https://www.mundabiddi.org.au/ Both trails have huts placed reasonable distances apart. The huts also have rain water tanks to help with the water access problem.