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The rough guide to reptile mitigation.... |
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sussexecology
Senior Member Joined: 30 Sep 2010 Location: United Kingdom Status: Offline Points: 411 |
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Absolutely agree about your comment re he consultancies that use the FrogLife Guidance. I've been reading some reptile reports from other consultancies and horrified to see that they are using this system. What i find annoying as well, is the ecologist who worked on the survey don't put any info on known records of reptiles. I think that there are some who don't even do a desktop study. I think that this is a prerequisite (if I can use that word) to obtain basic information about the area even before you even start putting refugia down. Totally agree with Gemma's comments though re the ticking of boxes to ensure that reptiles are not present. Whoever undertakes a reptile survey should have enough experience to do the job and that includes knowing the right conditions and how to undertake an adequate survey in the first place. Maybe it is time that more training was made available to the consultancies concerned, but to do this would cost money and in our current financial climate, i don't think it would be a possible. By the way, anyone seen any adders yet? I've started looking on a more casual basis, rather than for work but seen nothing yet. I also do reptile surveys for landowners and as part of NARRS because like you, I love reptiles. They are a challenging group of species to survey - which is probably why I love doing them. |
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Noodles
Senior Member Joined: 05 Dec 2010 Location: United Kingdom Status: Offline Points: 534 |
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Funnily enough i have seen all the common species
(including grass snake at the hibernacula on 24th Feb)but no adder yet (in Shropshire). Not, i should add, because they are not out. Based on previous survey work, the site i am looking at appears to support few adders (possibly only summer foraging)and there may or may not be any major hibernaculum in my survey area. I am certainly looking and have been for a few weeks now. Other midland sites such as the Staffordshire Moorlands and Cannock Chase have been been showing adders for up to a month now, albeit close to the hibernaculum. I really need to take a trip up to Whixall Moss which is our county Adder mecca to have a more informed look. Based on this I would imagine that Sussex adders should be well and truely out and possibly starting to loosely disperse, although i know not the area or the recent weather conditions. Look at 'Active Topics' on this forum for 'First herp sitings 2011' there is plenty on there to digest. As for the training courses, i know ARC (in conjunction with the FSC) are running a few courses this year and there are the IEEM courses too. Jon Cranfield (a.k.a. Herpetologic) is involved in both so he may be the man to ask, although i get the impression that you yourself are not looking. Happy hunting and if you are looking at potential hibernation sites i would be doing it now, including Grass Snake sites after this current cold snap. There must be numerous surveyors on this forum working at your latitude who would be better to advise. Cheers Rob |
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administrator
Admin Group Joined: 01 Jan 2007 Status: Offline Points: 10 |
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Here in Essex we've only had maybe 3 days that would have been worth a look, though heavy frosts before the sun kept me from going out. (OK I went out but it's hard to see adder from 3000' in the air ). The rest has been cool overcast. Tommorrow should be good before the warm front comes through bringing light rain for Sunday. I'm expecting a mix of post and pre-moult males around the hibernation areas, as scale has said we would be expecting dispersal by now but I've a feeling at my local site they won't have moved far as yet, still using the hibernaculum at night. |
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Robert V
Senior Member Joined: 06 Aug 2004 Location: United Kingdom Status: Offline Points: 1264 |
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Just been out to Adders haunts, bloody freezing and just when you thought a gap in the clouds would brings some rays to the ground, the wind changes slightly and clouds swallow the sun again. 3 vivs, I'll post pics later. R |
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RobV
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sussexecology
Senior Member Joined: 30 Sep 2010 Location: United Kingdom Status: Offline Points: 411 |
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Thanks for this Rob. To be honest, I haven't been looking yet because I've been a bit lazy! The day time temps are getting better and I am hoping to be out looking for hibernation sites in the next week or so. I've come across toads and smooth newts at end of feb. The night time temps have been so up and down but it is getting milder at last! No, I'm not looking for training but your are right about the IEEM courses - they are very good. I'm just a bit fed up with reading reports on sites that I'm taking over where the previous consultant has done a sub-standard survey. But that's life i guess! Thanks for your comments though and I'm looking forward to doing some fieldwork again. |
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Matt Harris
Senior Member Joined: 03 Jun 2003 Location: United Kingdom Status: Offline Points: 233 |
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I may be flogging a dead horse but I do like to moan about survey reports where the consultant has done the minimum 7 survey visits mentioned in FAS10, but then use this for an estimate of relative population size, whereas as I see it this is the minimum for presence/absence only. Apart from FAS10, are there any other guidelines as to the minimum site visits required to estimate relative population size?
If you mention 20 survey visits (as stipulated in FAS 10 to estimate relative population size), they react like you've just slaughtered their first born... |
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Local Authority Ecologist
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Noodles
Senior Member Joined: 05 Dec 2010 Location: United Kingdom Status: Offline Points: 534 |
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I think in some situations 7 visits would yield a peak count, depending on the species present. I would easily expect to get a peak count of Slow-worms at my two study sites after just minimal visits in optimum weather conditions. I can say this as i check both sites twice weekly throughout the active period, so i know the peak relative population count. I guess ultimately it depends on the experience of the surveyor.
From what i have read on this forum 7 visits may not even be appropriate to determine the presence of some low density snake species.
For population estimates of Slow-worm a peak count may represent 5 - 10% of the actual population, according to the many experts on the forum (based on capture returns, which seems to be the definitive and only way to know). I have actually seen this figure applied to a site based on numbers found under natural site debris during a single site visit! That should keep you up tonight |
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Matt Harris
Senior Member Joined: 03 Jun 2003 Location: United Kingdom Status: Offline Points: 233 |
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Thanks for the reply. I might be more relaxed for slow-worms but when it comes to grass snakes it would help me a lot if there were published guidelines to sath that 7 visits isn't enough for a relative population estimate.
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Local Authority Ecologist
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Noodles
Senior Member Joined: 05 Dec 2010 Location: United Kingdom Status: Offline Points: 534 |
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I totally agree. I bet you get plenty of Adders over your way too, deserving of the same survey considerations. Until we get stricter guidance on population surveys the planning ecologists/authorities cannot enforce. I'm sure that there must be reams of capture returns throughout the country to improve the current system. NE carried out similar research for GCNs, its about time our reptiles got the same treatment.
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Robert V
Senior Member Joined: 06 Aug 2004 Location: United Kingdom Status: Offline Points: 1264 |
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There is a question that I'd like to ask all you guys with regard to mitigation and it is very straight forward and simple but very hard to deal with.
How can you accurately determine the presence or not of reptiles at a site if you can't lay tins?
If they are constantly moved / disturbed / stolen, what is the answer?
Thanks
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RobV
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