Showing posts with label PTES. Show all posts
Showing posts with label PTES. Show all posts

Monday, 28 September 2015

Dormouse discoveries!

It is the end of a busy Friday afternoon and Laurie's phone rings. She looks down at the caller I.D., sighs and wonders what random question Rachel now has about bats (I still find bats incredibly complex and alien beings). Or birds. Or moths. Or Harvest Mice.
 

After reading my excited text, she tries to call me back right away. Of course, as I'm somewhere in Gatwick's woodlands with unpredictable phone reception, this goes on for sometime... 
   And so, after finally getting through to each other, I then get to say the words: we've got Dormice!

The elusive Hazel Dormouse (Muscardinus avellanarius)

Gatwick's sneaky ginger-ninjas have finally been spotted in the fur; they couldn't elude us anymore! Laurie is a licence holder for several UK protected species and experienced in Dormouse handling, so I was awesomely appreciative that she shot up to Gatwick to lend us a hand. We found two individuals in separate boxes; here they are, resplendent in their golden-brown refinery!

Hazel Dormouse (Muscardinus avellanarius)

We reckon these might some of the best-looking Dormice around too... (Not that we're biased).

Hazel Dormouse (Muscardinus avellanarius)
Big eyes, small ears, fuzzy tail. Evolved for maximum cuteness

These furry fiends are notoriously difficult to detect - they live in low numbers, are arboreal (tree-dwelling) and mostly come out at night. Still, after 3 years of surveying it was starting to wear that we hadn't seen the little blighters in the fur. Quite frankly, they were making us look bad. 

On the other hand, our Wood Mouse and Yellow-necked Mouse record database had really come along!

For comparison: Yellow-necked Mouse (Apodemus flavicollis);
 darker fur, bigger ears, pointy nose... Bigger attitude!

She might look chunky, but this little female weighed about 19g, making her over half the weight of a Yellow-necked Mouse which tipped the scales at 40g. 

Hazel Dormouse (Muscardinus avellanarius
Hey, remember folks, the camera adds 10 pounds

Slightly insulting was the fact that they were found in boxes installed by Tom Simpson's volunteer group, rather than mine from the 3 years before. This goes to show there is just no accounting for Dormouse taste (being from Crawley after all).

Laurie checks age and sex, then pops it into the weighing bag. 

Unoccupied nest - the centre is tightly woven with fine strands of Honeysuckle bark,
 the outside is layered with recently fresh hazel leaves

For now, we will continue with monitoring the Dormouse population at this site under the supervision of licence holders, carrying out regular box checks and looking out for signs of breeding.

Home-sweet-home

About this time every year, a YouTube vid makes the rounds of the internet, featuring a Dormouse apparently snoring. The mammal officer who took the footage says the ridiculous sound was added on afterwards; the actual sound is more like a high-pitched whistle (d'awww!). Still, it is gorgeous seeing a Dormouse in torpor (deep sleep).



To find out more about the Hazel Dormouse, check out the People's Trust for Endangered Species.

Tuesday, 16 September 2014

Detours for Dormice

Sadly, we have yet to detect the charming Muscardinus avellanarius in our woodlands at Gatwick, so I have to get my fix elsewhere... 

Hazel Dormouse

Last weekend I nipped off on a trip to that fair Isle of Wight, with Laurie and my housemate Debbie who is working towards her PhD in genetics. We were collecting hair samples for DNA extraction and had joined up with volunteers for the People's Trust for Endangered Species, monitoring Dormouse populations on the island.

Step 1. Finding the woodland...


Step 2. Finding the correct bit of woodland


Step 3. Finding ridiculously small nest boxes within forests of bramble and densely coppiced Hazel.


These woodlands at Briddlesford were fantastically well-managed by the PTES, but this did mean the terrain was tough, with areas of brambles at chest-height. Goose-stepping all day is hard work! 

As deer are absent from the island, a lack of grazing pressure results in healthy woodland understory

The Hazel Dormouse is a protected species in the UK and their populations have declined historically, so this data is all valuable and could contribute towards the conservation of this species.


Sleepy Dormouse mother with babies

Juveniles, individually weighed before being popped back into their nest


Mum receives a small hair pluck before being safely returned to the nest box

Ah jeez...

In the end we got lots of data for Debs, plus the Isle of Wight offered up some other niceties:

Wood Mouse (Apodemus sylvaticus) juveniles in a Dormouse box

Wood Cricket (Nemobius sylvestris), a nationally scarce species. 
These were quietly churring in the background

Common Carder Bee (Bombus pascuorum) on Devil's-bit Scabious (Succisa pratensis)

Volucella pellucens on Devil's-bit Scabious

Loads of Devil's-bit Scabious

Elephant Hawk-moth (Deilephila elpenor) caterpillar

A Linyphia spider, possibly L.triangularis

We were also treated to a sighting of the Red Squirrel (Sciurus vulgaris), but kinda like my birding photos...

Yeah no chance.