Leave No Trace New Zealand -"Promoting and inspiring responsible travel and outdoor recreation through education, research and partnerships."

Tuesday, December 3, 2013

Leave What You Find and save the giant land snails




I work in the outdoors industry and am firmly committed to minimising the impact that I and the groups I work with have on the environment. Several years ago I had an experience that made me reconsider this impact, beyond what my common sense and basic understanding had previously served me.

At the time I was working for outward Bound with an all male Watch of students from Work and Income on a three day tramp in the Mt Stokes area. They were a mixed bunch of drug users, ex cons and general delinquents but as happens on many an OB course there had been some positive behavioural changes and they were beginning to shows signs of trust and co-operation. A few hours into the tramps one of the students remarked with curiosity about finding the remains of a large snail shell and with my limited knowledge of the Powelliphanta species I explained what I knew about them and added that it was extremely rare to find a complete shell, never mind a live one.
Their interest must have been aroused as throughout the day the group stopped and marvelled at shells that were nearly complete and different colours and patterns. I was certainly pleased that they were looking beyond themselves and showing an appreciation of nature. On the second day we ascended to an area that has regular pest control and is the site of a study on the local Powelliphanta  population. At this point the students were showing an interest in the shells that were spotted that were almost complete, and some competition had formed between them to try to find the most complete shell. At about lunchtime, to my surprise, one of the students discovered a live snail and the whole group gathered around in reverence of this unusual and interesting find. It was a wonderful sight to see young men, some with gang associated tattoos, demonstrating such gentleness and appreciation. Their attitude demonstrated a high level of respect for something that is threatened and needs to be protected.
On the third and final day of the tramp, the task of navigation became more demanding and resulting focus from the students meant the interest in the snails was suspended. We had also descended to an altitude which was not a suitable habitat for them anyway so we didn’t see any more shells. Towards the end of this day it was beginning to look like they may not finish and be forced to spend an extra night out. We finally emerged from the bush as darkness was falling and the students were in high spirits at completing this challenging tramp. As we waited for the Outward Bound Truck to pick us up the students began to compare the collections of shells they had found, and I began to realise the extent of their “collections”. I was not particularly happy with the amount of shells that they had and were taking away but at this point believing there to be no discernible negative impact I considered the benefits to their attitude and learning to outweigh any loss due to the removal of the shells.
The following day I discussed this experience at the staff briefing, seeking some affirmation that this was an acceptable outcome. I contacted the local DOC office later in the morning and was surprised to discover that Powelliphanta use the empty shells to incubate their eggs and these almost complete shells are fundamental to their reproductive cycle.  Eggs would only survive for a short time outside the specific environmental conditions found at that altitude such as temperature, humidity etc. I went back to the Watch and shared my discovery with the students. Each student looked through their shells more thoroughly and not only did we find eggs but also live baby snails in some of the shells. We declared an amnesty on shells and collected over thirty from the students. The students were genuinely concerned that their actions could have such an impact on the very thing that they had found so wonderful and interesting. They wanted to know if they could take the shells back but it couldn’t be organised before the end of their course on the following day. I assured them that I would return the shells and in the mean time we would endeavour to keep them in the best possible conditions, which we found to be, covering them and placing them under the buildings.
I tramped back to the area that the shells had been found during my days off and relocated the shells. I had lots of time to reflect on this experience and was reminded of the role of guardianship that we must assume whenever we take others into the natural environment. Needless to say there was some great learning during group discussions with students and for me personally.
Contributed by Darren Rooney

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