In Australia (and elsewhere) it is quite common to encounter these beasties in wetter areas. They avoid sunny patches. They do you no harm, though many (like me) have an allergic reaction to their ‘bites’, so it is good to avoid them as much as you can.  I have already recommended this antihistamine Anthisan ointment to treat allergic reactions to bites. It works well on these leech bites too. Here: http://www.theultralighthiker.com/insects-can-ruin-a-camping-trip/ (you will have to order it over from a NZ pharmacy) NB the practice of tucking your trousers into your socks and wearing long-sleeve shirts in ‘leechy’ spots such as rainforest areas http://www.theultralighthiker.com/ultralight-personal-hygiene/.

You can watch the whole movie here:


When you put up your tent for the night you don’t want to erect it on a hundred leeches and have them wriggling all over you all night. I have seen shady areas where when you wave your warm hand over the ground a hundred leeches will stand up and wave at you! You need to carry a small atomiser containing surface spray such as ‘Baygon’ (which can be bought from some supermarkets in bulk – ie not in spray cans) to suit such decanting. Atomisers of various sizes are available all over (try eBay). You will need to match the size to your need. You need to be able to spray the entire footprint of your tent plus an area say a metre around it. If/when you do have a leech attach to you, remember it will do you no harm (indeed they have been used for centuries for their supposed health benefits) and will eventually drop off. If you want to hurry that along a bit, a lighted cigarette or some salt will move them on mighty quickly.

If (like my wife) you don’t like the idea of sleeping on surface spray, carry enough salt in a snap lock bag to sprinkle the same area. This will kill and keep leeches at bay too.The small amount of salt left behind in such high rainfall areas will not harm the environment.

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First Published on: Dec 12, 2015

A reader writes (See below) that there is a ‘less toxic’ product called ‘Leech Hound – Leech Barrier’ he has used to good effect (https://www.ebay.com.au/itm/263810846962). It is a bit more complicated to get your hands on though.

2 thoughts on “Leeches:”

  1. Baygone might be alittle too toxic if it means spraying and end up ‘pre-soaking’ my shoes and gear with baygone at the end of it

    Went trekking in Annapurna Base Camp earlier this year. We were haunted by the horde of leeches at lower altitude. Fortunately my guide brought along and recommended a ‘barrier’ repellent to us during our trek. It worked very well preventing leeches making its way up like an invisible shield! Here is how it looks on ebay – https://www.ebay.com.au/itm/263810846962

    Hopefully this helps another fellow adventurer from terrible leeches.

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