Calendar An icon of a desk calendar. Cancel An icon of a circle with a diagonal line across. Caret An icon of a block arrow pointing to the right. Email An icon of a paper envelope. Facebook An icon of the Facebook "f" mark. Google An icon of the Google "G" mark. Linked In An icon of the Linked In "in" mark. Logout An icon representing logout. Profile An icon that resembles human head and shoulders. Telephone An icon of a traditional telephone receiver. Tick An icon of a tick mark. Is Public An icon of a human eye and eyelashes. Is Not Public An icon of a human eye and eyelashes with a diagonal line through it. Pause Icon A two-lined pause icon for stopping interactions. Quote Mark A opening quote mark. Quote Mark A closing quote mark. Arrow An icon of an arrow. Folder An icon of a paper folder. Breaking An icon of an exclamation mark on a circular background. Camera An icon of a digital camera. Caret An icon of a caret arrow. Clock An icon of a clock face. Close An icon of the an X shape. Close Icon An icon used to represent where to interact to collapse or dismiss a component Comment An icon of a speech bubble. Comments An icon of a speech bubble, denoting user comments. Comments An icon of a speech bubble, denoting user comments. Ellipsis An icon of 3 horizontal dots. Envelope An icon of a paper envelope. Facebook An icon of a facebook f logo. Camera An icon of a digital camera. Home An icon of a house. Instagram An icon of the Instagram logo. LinkedIn An icon of the LinkedIn logo. Magnifying Glass An icon of a magnifying glass. Search Icon A magnifying glass icon that is used to represent the function of searching. Menu An icon of 3 horizontal lines. Hamburger Menu Icon An icon used to represent a collapsed menu. Next An icon of an arrow pointing to the right. Notice An explanation mark centred inside a circle. Previous An icon of an arrow pointing to the left. Rating An icon of a star. Tag An icon of a tag. Twitter An icon of the Twitter logo. Video Camera An icon of a video camera shape. Speech Bubble Icon A icon displaying a speech bubble WhatsApp An icon of the WhatsApp logo. Information An icon of an information logo. Plus A mathematical 'plus' symbol. Duration An icon indicating Time. Success Tick An icon of a green tick. Success Tick Timeout An icon of a greyed out success tick. Loading Spinner An icon of a loading spinner. Facebook Messenger An icon of the facebook messenger app logo. Facebook An icon of a facebook f logo. Facebook Messenger An icon of the Twitter app logo. LinkedIn An icon of the LinkedIn logo. WhatsApp Messenger An icon of the Whatsapp messenger app logo. Email An icon of an mail envelope. Copy link A decentered black square over a white square.

Otters: ditch predators

Post Thumbnail

For the last few weeks my sensor-activated trail camera has been monitoring a ditch near my home in the hope of capturing water voles and water shrews on video.

An offshoot of the River Devon, this ditch is turning into an obsession of mine and I only have to wade a few yards up its course to become enveloped in its warm embrace; a secret haven as truly wild as one can imagine. It is a place where you can listen to the purity of nature, the wind whispering through the branches of the trees above and the water’s gentle gurgling.

The water here is even-flowing and clean, with the bankside vegetation abundant and lush; the perfect location for elusive water voles and water shrews to thrive.

But all is not as it seems, for there has not been a sniff of either creature. Why? Well, perhaps it is because my video clips have revealed this ditch to be a super highway for predators, with otters, mink and a stoat all being caught on camera. In fact, there has been so much activity by these predators that one wonders how any small creature could survive here at all.

The stars have been the otters and I’ve captured several night-time clips of these animals on infra-red video. The water is shallow, but just deep enough for the otters to swim or use their feet to scrabble along the bottom.  More times than not, otters have headed-up the ditch but do not return back down it. The ditch peters out several hundred yards further on and I presume that these otters then continue their journey over land.

Otter by Frozen Pond

The stoat was an exhibition of hunting efficiency, scampering along the edge of the lapping water, exploring every nook and cranny in search of mice and voles.  Mink were also captured on film. These introduced animals from North America are, of course, the principal cause behind the catastrophic decline in our water vole population.

Despite such heavily stacked odds, small mammals do occur here and on two occasions the camera picked up a brown rat swimming in the water. We don’t tend to think of rats as aquatic creatures but they are adept swimmers and frequently live by water courses.

While my trail cam has revealed a wonderful world of wildlife activity, the absence of water voles and water shrews has been rather disappointing. All the more so, because a couple of years ago I had found the feeding station of a water vole in this very same ditch, comprising of a little pile of finely nibbled rushes. I do hope the voles have not gone.

Water shrews are equally intriguing and are themselves avid predators of a wide range of small creatures including minnows and tadpoles. They will even take adult frogs. A pretty amazing feat really, given that in comparative terms, it is a bit like the titanic struggle involved when a lion tackles a buffalo.

Info

Water shrews are localised but widely distributed in Scotland and often, but not exclusively, occur by fresh water.  Mild poison in their saliva is thought to help water shrews subdue their prey.