Vole Patrol 5: Woodmouse Woz Ere

See Vole Patrol 4: Baiting not Trapping

I stumbled out of bed a bit late this morning and only just arrived in time to join the Vole Patrol team. The good news was some sunshine, birdsong (Song Thrush the highlight, with Great Tit, Robin, Dunnock, Long-Tailed Tit) for the dawn chorus, and proof from many of the traps of mammal activity.

Woodmouse Woz Ere
Woodmouse Woz Ere

Without wishing to get too scatological, a Wood Mouse laid some definitive, er, evidence of its presence on the door of this trap, which does bear an uncanny resemblance to a miniature toilet. There are actually 2 mouse droppings (the other one is on the hinge) in the photo.

It’s  a mouse dropping, not a shrew’s, as shrew poo contains so many shiny, slippery insect cuticle fragments that it tends to fall apart, whereas these pellets have the solid consistency of a mouse’s diet of seeds.

Huma mixing bait (photo Joanne from Grow Chiswick)
Huma mixing bait (photo Joanne from Grow Chiswick)

Other traps had had their bait balls eaten (but not the maggot larvae, which shrews would prefer); some had bait crumbs outside their entrances, and others had leaves dragged inside, as if to make a nice warm nest.

Ian labelling traps (Joanne photo)
Ian labelling traps (Joanne photo)

Jo took these fine photos a day or two ago. I seem to have enjoyed labelling those traps!

 

 

Vole Patrol 4: Baiting not Trapping

See: Vole Patrol 3: Baiting Traps

At quarter to seven this morning we wrapped up well against the cold, on a beautiful clear day, the crescent moon glowing in the southeastern sky, and gathered at the hut. After a welcome cup of tea, we picked up haversacks full of boxes of bait balls, a little bag of apple slices and another of maggots, and a rubbish sack. We trooped off down the reserve to inspect the traps arrayed around the wood, meadow, and pond.

Was there a mammal in here? Inspecting one of the Waterside traps
Was there a mammal in here? Inspecting one of the Waterside traps

A Song Thrush sang loudly and beautifully from the Willow Carr thicket.

Bait Taken from Meadow Trap
Bait Taken from Meadow Trap

In the anthill meadow, trap M3 showed unmistakable signs of a mammal visit spilling from the entrance.

Did we catch something by mistake?
Did we catch something by mistake?

Another of the meadow traps caused a flurry of excitement. The trapdoor was up! Had we somehow caught a mammal, despite checking that all the trapdoors were locked down? Huma carefully opened the trap in a large plastic bag to prevent escape. There was nothing inside. Probably the trap had been left with the door closed.

Making Bait Balls
Making Bait Balls

Back in the hut, still with surgical gloves on, we mixed up more bait and rolled it into balls. The little boxes that protect the bait balls in the haversacks are on the table.

 

 

Vole Patrol 3: Baiting Traps

See Vole Patrol 2: Shrew Poo

Trapdoor locked open for baiting
Trapdoor locked open for baiting

Today we began a week of intensive trapping. Huma wants to survey the small mammals now, before there is any risk of catching pregnant or nursing mothers. So we are going to put out and check traps every morning and evening.

The traps we’ll be using are a new design of tube trap. They are less fiddly than the old aluminium Longworth traps, and a lot cheaper too. Huma thinks they’re “volunteer proof”: we wonder. Being plastic, they are warm and comfortable for the mice, voles and shrews we hope to catch.

Huma instructing the trapping group
Huma instructing the trapping group

We learnt what to measure, and the distinguishing features of the species that we may see. Huma explained how we would set out the traps, in a grid of three rows of six traps (so, A1 .. A6, B1 .. B6, C1 .. C6), evenly spaced in the woods, with four more up in the trees (T1.. T4), five in the meadow (M1 .. M5), and five near water (W1 .. W5).

Labelling tube traps
Labelling tube traps

Each trap has two parts, so I painted its name onto each half.

We grouped the labelled traps into neat carrying trays.

Hay, Apple, Bait Balls
Hay, Apple, Bait Balls

While I was painting, the others rolled chicken feed, peanut butter, seeds and water into bait balls.

Checking the Tube Traps
Checking the Tube Traps
A sprinkling of frozen maggots
A sprinkling of frozen maggots

Then we put a handful of clean hay, a bit of apple, a bait ball, and a sprinkling of frozen maggots into the round end of each trap, armed the trap, locked the door open, and clicked the two halves together. The first two days and nights we don’t want to catch anything, but to accustom the mammals to visiting the traps.

We lined up in the wood, carefully set down the traps along natural edges, and marked their positions with hazard tape.

We have to visit them at 7am tomorrow morning…