Tag Archives: harvest mouse

In which we find woodmice, bank voles, field voles, and pygmy shrews but no harvest mice

As the alarm went off at 5.20am the other day, I did wonder why I had let myself in for such an early start on a precious day off. The rain beating against the windscreen as I drove through the dark, empty roads didn’t encourage me, either. I pulled up in the near deserted superstore car park, and it crossed my mind that this was not a normal thing to be doing.

The rain had stopped by the time I had got out of the car and wellified myself, and the remains of the supermoon cut cleanly through the sky. Our small group of like minded eccentrics congregated and headed off down an obscure path in the corner of the car park, lighting headtorches as we moved out of orange glare of the street lamps.

The path went under the dual carriageway, beside the river, to an isolated area of  waist-high marshy grasses, visible only in the small patches illuminated by head torch beams. After a bit of searching, we found the cached hoard of straw, food and weatherwriter, and stocked up the black bin bag. It didn’t look at all suspicious, four people walking around deserted wasteland at 6am in the morning carrying a black bin bag. I did wonder what anyone looking out of a window from the houses across the river must have thought.

We headed into the grass towards the scrap of striped tape that marked the first trap point, where two longworth traps (one on the ground, and the other set a couple of feet up on a stake) waited.

There’s always a frisson of suspense as you approach a small mammal trap. Has it been tripped? If so, what will it contain? We had a bumper harvest that morning – 8 woodmice, 2 field voles, 2 bank voles and one fiesty pygmy shrew. But none of the animals we were really searching for: harvest mice.

Field vole
Field vole

As the bright November morning dawned, we were able to get a better look at what we caught. If you think that one small mammal species is much like another in temperament, you’re mistaken. As you can see from these photos, voles are pretty chilled. I didn’t get any photos of woodmice (it was too dark when we found them, and they move too quickly). The tiny pigmy shrew was my personal favourite. You’ve got to admire a creature that, though about as big as a thumb nail, decides to try to bite its captor’s hand (it’s teeth weren’t long enough the penetrate the skin, but it gave it a good go).

Pygmy shrew trying to bite
Pygmy shrew trying to bite
Vole
Vole

The check was part of Surrey Mammal Group and Surrey Wildlife Trust’s harvest mouse project. We’re trying to get fur samples from harvest mice populations in different sites in the county. These samples are then DNA tested to allow us to see how closely related they are, or whether harvest mice at different sites have very different DNA to each other. The point of this is to see how good the connectivity between sites is for wildlife. Connectivity is important, as isolated populations are vulnerable to being wiped out.

This is our third year of the project. In the first year we were able to get enough samples for the lab scientists to identify plenty of DNA markers that will allow us to compare different harvest mice populations. Last year, when we went back to survey the sites that had had lots of harvest mice the previous year, we found very few. And we’ve not had large numbers this year, either.

We repeated the survey that evening, starting and ending in the dark, and found similar numbers of woodmice, bank voles, field voles and a single pygmy shrew, but again no harvest mice. The voles decided that sitting on hands was a morning activity – in the evening it’s all about climbing onto heads. This one seemed to particularly enjoy Derek’s hair – it looked like it was planning to settle down up there. Glen and Keith also got scaled by intrepid vole explorers.

A vole in the hair...
A vole in the hair…

By the end of the check it was bucketing down, and I was very pleased to get home to a warming bowlful of food, prepared by Dr C.

It’s not hugely surprising we didn’t find any harvest mice at this site – it really is cut off from other harvest mouse habitats (I suspect voles and woodmice are a little less particular in the sorts of neighbourhoods they’ll live in). And, while we didn’t succeed in our aim for the checks, it was still great to see small mammals at such close quarters. And it was worth braving the elements and giving up a lie-in to have that privilege.

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British Animal Challenge 2015 round-up

Happy new year everyone! Before we plunge into whatever the new year has in store for us, I find it helpful to reflect on the year that’s just gone. It’s been a tough but interesting year for me work-wise, but on a personal level I think there have been more ups than downs. Some of the most memorable moments have been wildlife related – the hedgehog walking past our toes when we sat in the garden at dusk; snorkelling with seals; finding dormice for the first time at my dormouse monitoring site; winning the Surrey Wildlife Garden awards, and seeing some species in the wild for the first time.

Back at the beginning of 2014 I set myself the challenge of seeing, in the wild, every species of British animal. This includes mammals, amphibians and reptiles but not invertebrates or birds. There are approximately 107 species on the list. By the end of 2014 I had seen 45 of them (seeing 11 for the first time in 2014).

2015 was a mixed year for my British Animal Challenge. I targeted reptiles, amphibians and bats in the first half of the year, but didn’t make any progress on those. The second half of the year was much more successful. I saw red squirrels and lesser white-toothed shrews during my trip to the Isles of Scilly. And, after lots of attempts and many hours, I finally managed to see a water shrew and some harvest mice.

This year I’ve only ticked off five new species:

Adult red squirrel
Adult red squirrel

 

This takes my total up to 50 – not quite halfway there. I’m doing well with some classes:

  • 5/7 British insectivores
  • 10/14 rodents

Others I’m still a long way off, particularly bats, amphibians and cetaceans.

I’m not sure what my focus will be for next year, as I haven’t worked out where I can go on holiday. But I live in a good place for reptiles and bats, so that’s probably a good start. And I’d love to see an otter in the wild…

Whatever’s in store for the year ahead, I hope we all have a wild and wonderful 2016.

British Animal Challenge November update

November has flown by. Sadly my efforts to see a harvest mouse led only to sightings of woodmice and field voles. But it’s good to have ticked field voles off the list.

Jim the trap-happy field vole
Jim the trap-happy field vole

Apart from that, I haven’t been out and about much. I hope, weather permitting, that I will have more time to spend looking for wildlife in December. I don’t have any particular targets in mind (although I’m heading down to the River Otter, so would love to see a beaver – highly unlikely, I know).

To be honest, I feel just about ready for hibernation. Maybe I’ll try and use the time tucked up by the fire to plan next year’s wildlife adventures…