What's small and golden-brown....
...and climbs around in the wheat?
((Some pictures in this post might upset.))
A
Harvest Mouse [
Micromys minutus]
Rat des Moissons of course...
Our story starts when Baron proudly marched in with...
not a vole...
but this ball of grass!
%2B-%2B%5BWG2_3311%5D.jpg) |
Small and spherical...
the cross-head screw gives scale! |
|
I'd found Harvest Mouse nests occasionally when mowing the pré...
and immediately recognised it!
This one may well have had an occupant when Baron "
caught" it!
He hunts by hearing, not scent.
It is easy to imagine the little critter wondering what was happening....
and making a break for cover as it was being transported back!!
%2B-%2B%5BWG2_3312%5D.jpg) |
Door's open....
no one at home! |
Wonderful object, the Harvest Mouse nest, the size of a tennis ball...
we've blogged
about finding one before
and so to re-blog the main information:
"
It is the nest of a Harvest Mouse [Micromys minutus] Rat des moissons.
It is a loose woven ball of grass.
There are no signs of an exit/entrance hole.
It is also exceptionally clean.
These are all indicators to me of what it was...
Its position, quite high up in the brambles, isn't really an indicator as this would have been a very good site for many birds.
No hole? Yes, no hole. The harvest mouse pushes its way in and out, the hole closing behind it. This leaves the young in a secure, invisible package."
So this one
has a hole...
either not occupied...
which I think was unlikely...
Baron
is a few braincells short of a full package, admittedly, but he's not that daft...
or there was something in the nest...
which left in haste, no time to close the front door!!
Then, when I mowed the central portion of the verger...
an awkward triangle that will be the site of an hotel for insects...
I found three more...
all disused....
 |
A tower of nests....
the top one is very dilapidated...
either well used....
or built by a juvenile? |
but none more than three and a half months old...
the last time I'd mowed that area flat was at the beginning of May.
Also for a creature that builds nests between five and twelve cms across...
these were all at the ten to twelve end...
which could indicate a breeding population as the large size is used for breeding.
However, about a week before, Baron had come in with the poor little mouthful below...
a youngster, at 2.9gms, so not long expelled from the nest...
which confirmed my theory.
Pauline wanted to report the "find" on
Faune Touraine so it was photographed and weighed...
as was the nest he'd brought in earlier.
 |
| Our precision scales for field measurements. |
 |
| It was only half a gram heavier than the nest. |
 |
Tail almost the same length as the body and almost hairless...
and note the head end is vole-like...
NOT mouse-like....
with very small, hairy ears. |
It turned out to be the first actual sighting of a Harvest Mouse...
despite the fact that they aren't exactly uncommon....
just unobserved....
all the other records had come from owl pellets as skulls.
In fact most of the records of mammals, 'cept squirrels and hares, on Faune Touraine...
seem to be of the well known species, such as...
pressed rat...
flatbrock...
tyredtiggywinkle...
wellironedrenard....
etc.
You get the picture...
but
it is important to record roadkill, however unpleasant and upsetting...
it adds to population dynamics, both number and "end of life" cause.
Following that, I found a nest, still suspended in the unmown grass beneath one of the fruit trees...
the door was open... so probably unoccupied...
I say probably because if there are young in the nest....
they might have been outside whilst I blundered around near the tree...
before I'd spotted it....
and dropped into the grass beneath.
 |
The doorway is the small, dark spot...
on the upper right surface. |
After a few days, and some quiet watching, there had been no change to the nice round doorway...
so I harvested the nest, this time still suspended by the stalks of grass....
by carefully cutting the grass stems much lower down.
The topmost blades of the stems that it is built amongst...
are very carefully incorporated into the nest, thus securing it.
Wonderful to behold.
This, nest and stems, is now boxed up.
Any local readers who would like to see it, just ask when you call round...
it is a marvel to see in the round, as it were...
flat pictures don't really do it justice.
 |
| And all four nests together... |
There is still one that we know about out there...
Pauline discovered it beneath one of the hazels as she was harvesting fallen nuts...
Most definitely a Harvest Mouse nest, a door has been invisible on occasions...
which is why it has been left.
They will breed up to early October...
in fact they breed up to seven times a year [that
is a captivity number]!!
 |
| Spot the ball!! |
Then Baron came in, proud as Punch....
and placed a live Harvest Mouse at Pauline's feet...
he was shouted at and backed off quickly, allowing me to pick the wee mouse up and cradle it...
Pauline passed me the camera, having turned it on and I managed the picture below...
You will easily see that the adult, while vole-like, does have a longer nose...
and the tail is smooth, almost scaly in appearance, but the ears are very small...
OK, back out to the verger with it, camera in hand, mouse closely cradled against chest...
my intention was to put it on top of the nest and take another photograph.
Fat chance...
As I walked back to the nest that was left, the tail curled around my finger...
and the mouse shuffled around a little...
becoming more active....
getting over the shock of seeing Baron's tonsils in close-up....
arrived at nest, readied camera....
gently offered mouse up to convenient perch...
viz. top of nest...
mouse leapt for nearest hazel stem...
landed, swivelled, and shot down into the grass below...
and vanished!!
No time to move camera, or press the shutter!!
At least with Field Mice, they take a pause to gather themselves....
before scampering off...
and you can watch them go!
Not the Harvest Mouse, apparently...
their survival instinct says...
"DROP"...
and then vanish in the long grass...
all I can say is....
it works!!
However Susan, of
Days on the Claise, sent us this link to some marvellously cute pix...
taken in Alsace by a couple of researchers...
each pic reloads the page... so on an old machine it can take a while...
but it is worth it...
Susan's
link to more CUTE pix.
And there are more of their pix on the Archive slideshow...
link in the notes below...
and...
for the inquisitive out there....
here is some further reading....
including about the re-use of used Wimbledon tennis balls...
gathered, via the Web, from:
____________________________________________________________
The Mammal Society ::::
Common Name:
Harvest mouse
Scientific Name:
Micromys minutus
Downloadable Factsheet; basically what's below... with pictures
harvest_mouse_complete.pdf
Description:
Blunt nose, small eyes, and small hairy ears in contrast to other British species of mice and also much smaller; prehensile tail the same length as the head and body; russet orange fur with a white underside.
Size:
50-70mm.
Weight:
4-6 g.
Diet:
They eat a mixture of seeds, berries and insects, although moss, roots and fungi may also be taken. Harvest mice sometimes take grain from cereal heads, leaving characteristic sickle-shaped remains. Noticeable damage to cereal crops is extremely rare.
Lifespan:
18 months on average.
Origin & Distribution:
Native. The harvest mouse is mainly found from central Yorkshire southwards. Isolated records from Scotland and Wales probably result from the release of captive animals. Areas of tall grass provide favourable habitats, such as cereals, road side verges, hedgerows, reed beds, dykes and salt marshes where nests can be built.
Habitat:
Grassland
Arable land
Behaviour:
Harvest mice are extremely active climbers and feed in the stalk zone of long grasses and reeds, particularly around dusk and dawn. Their hearing is acute and they will react sharply; they either freeze or drop into cover in response to rustling sounds up to 7m away. Harvest mice have high energy requirements; the cost of being warm blooded and coping with a high surface to volume ratio.
Breeding nests are the most obvious sign indicating the presence of harvest mice. The harvest mouse is the only British mammal to build nests of woven grass well above ground. Nests tend to be found in dense vegetation such as grasses, rushes, cereals, grassy hedgerows, ditches and brambles. They are generally located on the stalk zone of grasses, at least 30cm above ground in short grasses and up to a metre in tall reeds. The size of the nest can vary from only 5cm in diameter for non-breeding nests to 10cm in diameter for breeding nests.
Harvest mice have many predators: weasels, stoats, foxes, cats, owls, hawks, crows, even pheasants.
Breeding:
Harvest mice usually have two or three litters a year in the wild, between late May and October, but even into December if the weather is mild. Most litters are born in August. Cold wet weather is a major cause of mortality. There are usually around six young in a litter. The young are born blind and hairless but grow extremely quickly and start to explore outside the nest by the 11th day. The young are abandoned after about 16 days, but continue using the nest which may at then start to look rather dilapidated. A fresh nest is built for each litter.
Conservation Status:
Harvest mice are listed as a BAP (Biodiversity Action Plan) Species because they are thought to have become much scarcer in recent years and they require conservation plans to reverse the decline. Changes in habitat management and agricultural methods are thought to be the main cause for the loss of populations from certain areas, although there have been no reliable studies to quantify this change.
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From ARKive::::
Harvest mouse biology
Harvest mice have bouts of activity throughout the 24-hour period, but they tend to be more active during the evening and night.
In summer they become increasingly nocturnal, whereas during the winter they are more active in the day.
They are adept climbers, and typically feed up in the stalk-zone of long reeds and grasses.
Depending on the time of year, harvest mice feed on grass seeds, cereals, berries, insects, fruits and the young shoots of grasses.
The nests of harvest mice are the most complex structures made by any British mammal.
These spherical nests, constructed by pregnant females, are made of woven grasses and may measure up to 10cm in diameter.
They are located up to 1 metre above ground in grasses or reeds.
Breeding takes place between May and October, and when the weather conditions are suitable, they may even continue to breed until December.
Between 3 and 7 litters are produced a year, each consisting of 1-8 young.
Births usually occur at night.
The female suckles the young until they reach around 9 days of age, at which time they are given their first solid food in the form of chewed seeds.
When the young reach around 18 days of age, the female may become aggressive towards them, ejecting them from the nest.
Upon reaching 6 weeks of age, the young will be able to breed.
Very few harvest mice live beyond 6 months, although the maximum recorded lifespan is 18 months.
Main causes of mortality are cold or wet weather, sudden frosts, and predation by weasels, stoats, foxes, cats, owls and crows.
Harvest mouse habitat
This species seems to prefer dry areas, and so its distribution may be affected by summer rainfall.
They inhabit dry reedbeds, patches of bramble, hay meadows, and some crop fields, particularly where there are winter refuges such as grassy banks.
They may also occur in hedgerows, field edges and other linear habitats, as well as wasteland in urban sites.
Harvest mouse threats
The harvest mouse is susceptible to changes in land use;
combine harvesting, burning of stubbles, ploughing, hedge trimming or removal and the use of pesticides all impact on this species.
Climate change and flooding are also likely to pose a threat.
Harvest mouse conservation
This species is not currently legally protected in the UK.
Chester Zoo is coordinating a captive breeding and reintroduction programme in the county of Cheshire, in order to reinforce populations in that area.
This well-managed captive population provides a safety net for Britain's wild harvest mice, and has enabled successful husbandry and captive breeding methods to be devised.
Should the species become threatened in the future, these techniques will be essential in maintaining the species, and the captive population will provide a source of reintroductions to the wild.
Full slideshow on ARKive.
____________________________________________________________
From
Wikipedia, the free encyclopedia::::
Eurasian harvest mouse
The harvest mouse, Micromys minutus, is a small rodent native to Europe and Asia. It is typically found in fields of cereal crops such as wheat and oats, in reed beds and in other tall ground vegetation, such as long grass and hedgerows. It has reddish-brown fur with white underparts and a naked, highly prehensile tail which it uses for climbing. It is the smallest European rodent; an adult may weigh as little as 4 grams (0.14 oz). It eats chiefly seeds and insects, but also nectar and fruit. Breeding nests are spherical constructions carefully woven from grass and attached to stems well above the ground.
History
Before the harvest mouse had been formally described, Gilbert White believed they were an undescribed species, and reported their nests in Selborne, Hampshire:
"They never enter into houses; are carried into ricks and barns with the sheaves; abound in harvest; and build their nests amidst the straws of the corn above the ground, and sometimes in thistles. They breed as many as eight at a litter, in a little round nest composed of the blades or grass or wheat.They are 8cm long. One of these nests I procured this autumn, most artificially platted, and composed of the blades of wheat; perfectly round, and about the size of a cricket-ball. It was so compact and well-filled, that it would roll across the table without being discomposed, though it contained eight little mice that were naked and blind."
Conservation efforts have taken place in Britain since 2001.
Tennis balls used in play at Wimbledon have been recycled to create artificial nests for harvest mice in an attempt to help the species avoid predation and recover from near-threatened status.
Look at the cute photo!!
Description
The harvest mouse ranges from 55 to 75 mm (2.2 to 3.0 in) long, and its tail from 50 to 75 mm (2.0 to 3.0 in) long; it weighs from 4 to 11 g (0.14 to 0.39 oz),[3][4] or about half the weight of the house mouse (Mus musculus). Its eyes and ears are relatively large. It has a small nose, with short, stubble-like whiskers, and thick, soft fur, somewhat thicker in winter than in summer.
The upper part of the body is brown, sometimes with a yellow or red tinge, and the under-parts range from white to cream coloured. It has a prehensile tail which is usually bicoloured and furless at the tip. The mouse's rather broad feet are adapted specifically for climbing, with a somewhat opposable, large outermost toe, allowing it to grip stems with each hindfoot and its tail, thus freeing the mouse's forepaws for food collection. Its tail is also used for balance.
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Lovely info in a PDF about captive breeding by Wildwood at Chester Zoo (for release into carefully selected sites) at....
http://www.wildwoodtrust.org/files/harvest-mouse-captive-breeding.pdf
____________________________________________________________
Red List - Least Concern::
Geographic Range
Range Description:
The harvest mouse has a large range in the Palaearctic and Indomalayan regions, where it occurs from northern Spain and Great Britain through Europe, eastern Fennoscandia, and Russia to northern Mongolia, China, the Korean peninsula, northeast India, Myanmar and Viet Nam (Corbet 1978, Panteleyev 1998, Spitzenberger 1999); also Japan and Taiwan. It is present on the border between southern Sweden and south-east Norway, where it is regarded as possibly introduced (van der Kooij et al. 2001, Wilson and Reeder 2005, van der Kooij et al. in litt. 2006).
In Europe, it is largely absent from Iberia, southern part of Italy, the Alps, and it occurs only sporadically in the Balkans. It is typically a lowland species, although it occurs at altitudes of up to 1,700 m asl in Europe (Spitzenberger 1999).
It is restricted to the northern parts of Mongolia, including Mongol Altai, Hövsgöl, Hentii and Ikh Hyangan mountain ranges, Mongol Daguur Steppe and Eastern Mongolia.
In Japan, the species is found on Honshu (Miyagi and Niigata Prefectures southwards), Shikoku, Kyushu, as well as the Oki Islands (Dogo, Nishinoshima, and Nakanoshima), Awaji, Teshima, Innoshima, Osaki-kamishima, Tsushima, Shimoshima (Amakusa Islands), Fukue (Goto Islands), and Kuchinoerabu (Osumi Islands) (Abe, et al., 2005). The species is likely found more widely on small islands in the vicinity of the known distribution in Japan (Abe, et al., 2005). The species is found from sea level up to 1,200 m asl in Japan.
Countries:
Native to...
Armenia (Armenia); Austria; Azerbaijan; Belarus; Belgium; Bosnia and Herzegovina; Bulgaria; China; Croatia; Czech Republic; Denmark; Estonia; Finland; France; Georgia; Germany; Greece; Hungary; India; Italy; Korea, Democratic People's Republic of; Korea, Republic of; Latvia; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Moldova; Mongolia; Montenegro; Myanmar; Netherlands; Poland; Romania; Russian Federation; Serbia (Serbia); Slovakia; Slovenia; Spain; Switzerland; Taiwan, Province of China; Turkey; Ukraine; United Kingdom; Viet Nam
Population:
Population declines have been noted in many parts of Europe. However, populations of this species fluctuate drastically, and some reported declines may in fact have been part of a natural fluctuation (Trout 1978, Haberl and Kryštufek 2003). The species is hard to trap and is often not recorded even when it is present (Haberl and Kryštufek 2003). However, nests may be found quite easily by experienced observers (R. Juškaitis pers. comm. 2006).
It is considered to be common in South Asia.
Population Trend: Stable
Habitat and Ecology:
Present in a wide variety of habitats, including alpine grasslands, tall grass fields, bamboo stands, wetlands, reedbeds, and clearings and edges of humid forest. It has also adapted to a variety of anthropogenic habitats, including gardens and arable land (in the wetter north-western parts of its range), drainage ditches, and grain or rice paddies (Spitzenberger 1999). It has a high tolerance of disturbed habitats (Haberl and Kryštufek 2003). Their diet includes seeds, green vegetation, insects, and bird's eggs.
Systems: Terrestrial
Major Threat(s):
There are no major threats throughout its range. In Europe the species is common in wetlands (e.g. rice fields) and other habitats (e.g. abandoned agricultural land). There are no serious threats to the survival of the species, although local population declines have occurred in some areas as a result of loss and degradation of wetland habitats (Spitzenberger 1999).
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This is the text that is with the pictures if you follow Susan's link:
[it is a bit difficult to follow as picture changes to picture...]
Photographers
Jean-Louis Klein and Marie-Luce Hubert spent one year photographing the
adorable little creatures in a project that saw them released from
captivity into the wild.
Waiting patiently in meadows and reed
beds close to their home in Alsace, France, the pair were able to
capture some extremely cute moments.
From the studio - where the
pair documented tiny newborns and their first few weeks of life - to the
great outdoors where all of the 30 mice were eventually released, the
pictures take viewers through a variety of events faced by the mice.
Jean-Louis
said: "All of the harvest mice came originally from captivity and we
eventually released them into a field where we continued to photograph
them, always carefully choosing a suitable habitat where we knew they
could survive.
"We also wanted to show the behaviour of the
animals during maternity, but we wouldn't have been able to get this in
the wild without disturbing the mother and there was a danger a wild
mother might have abandoned them. Instead we shot the maternal behaviour
in a studio before releasing the mice once the babies were mature
enough for the wild.
To demonstrate how mice often take to the
water in the wet meadows they inhabit, Jean-Louis and Marie-Luce gave
one of their subjects a dip in a mouse-sized aquarium before releasing
it into the wild.
The harvest mouse is the smallest European rodent. An adult can weigh as little as four grams (0.14 ounces).
"When
shooting in the wild, we didn't need a hide. You just had to find a
good spot, lay very still for a long time, and wait for the mice".
OK! I'll have a go at that next year!!
