2021 End of year review - Day 3

This is day three of my end-of-year review.  There is no particular reason why otters should be mainly active at night but a thousand or two years of human persecution have probably changed their behaviour.  Otters are elusive creatures at the best of times so it is real thrill to see one in daylight.  Even the trail cameras, away from human activity, still record most of their images in black & white at night.  Last winter there were several recordings of daytime action, including this video of an otter breaking the ice to get into the water, recorded on three adjacent cameras in January.

2021 End of year review - Day 2

This is the second of my top seven 2021 videos.  I had seen a weasel running in and out of the garden in August so I set up a trail camera on a path in the meadow.  Three times in the next few days the weasel ran past carrying its prey, first a field vole, then a bank vole, and last a wood mouse.  It was so fast that I first thought on the camera's small review screen that they were blank recordings.  I added a 1/10 slow-motion replay to make more sense of the images.

2021 End of year review - Day 1

My end of year reviews have usually been posts of my favourite photos between Boxing Day and New Year.  This year it will repost my seven favourite videos, one each day, so I am starting early.  The videos all appeared on this blog during 2021 and are in no particular order.

The first is a video recording made through the kitchen window in June.  Merry Christmas.

OtterCam in December

The otter cub is now on its own, although it is still in the territory.  I last saw mother and cub "together" in mid November although even then the cub was trailing a long way behind, testing mother's patience.  The water level in the culvert was high in late November and the camera has difficulty detecting a swimming otter with just its nose and ears out of the water so there were few recordings.  Since then I moved the cameras to a small gully at the edge of the lake.  I had many good recordings there last winter but nothing when I tried this autumn.  Now, however, the camera is again seeing otters every night.

There is a spot a metre or two from the water's edge that they use for scent marking.  Every time an otter passes it pauses to have good sniff to find out who else is out and about, and often leaves its own message.  This is the dog.

The cub is less used to the cameras and pauses to sniff those as well.

Here is the cub going down the bank, still calling its mother, although there was no other otter recorded for several hours this time so she wasn't nearby.

And a very interesting sequence from a couple of days ago.  The dog otter went down the bank and again sniffed the message board.  As he turned towards the camera we can see he has a wound or scar near his left ear, or possibly part of his ear missing, presumably as a result of fighting with another otter.

(I have checked back through other recent recordings but there isn't another clear view of his left ear to tell how recent the injury is.)  He left the scene stage left and two minutes later another smaller otter came out of the water, sniffed, and went up the bank.  They must have been aware of each other - perhaps the smaller otter was waiting for the dog to move on before leaving the water.

And finally, a distant cousin of the otters, another mustelid, dropped by to see what had been going on but decided against going for a swim.

These videos were all recorded with a +0.5 dioptre lens on the trail cameras.  I hope the quality is OK once they have been downsized by YouTube and Blogger because the originals are really sharp.

WrenCam

I live in hope of another visit from a weasel to the trail camera box but for the moment it is nearly all wood mice.  The bank voles seem to have given up after realising there was no free food on offer but wood mice call in every night just to check.  This visitor made a welcome change.  Perhaps I should have called this post TrogTrogCam.

Through the kitchen window

I could hear the crows and magpies complaining when I was standing in the kitchen this morning but I couldn't see what they were upset about.  I knew it wasn't the sparrowhawk because the small birds seemed unconcerned.  Then suddenly a buzzard landed right in front of me.  I grabbed the nearest camera and just had time for this photo before it flew off, pursued by the corvids.

This is only the second time I have seen a buzzard in the garden, although they often fly overhead.  The last time was in the very cold winter eleven years ago but that one was at the top of my tallest ash tree so there was no photo.

Buzzards are birds of moorland and farmland and are rare garden visitors, so they don't feature in the data summaries from the BTO Garden BirdWatch.  The population has increased ten-fold over the last 40 years and they are now our most abundant raptors.  This graph is from the BTO Bird Trends.

This graph from the BTO/JNCC/RSPB Breeding Bird Survey shows the population growth in the North East so maybe I won't have to wait another 11 years for the next visit.

An update from OtterCam

It is a couple of months since I reported on the activity on OtterCam.  I have kept one camera in the culvert all the time because it is the most reliable place to see which otters are out and about, although it often doesn't show much in the way of interesting behaviour.  It is also the one place that seems to be free of rats - elsewhere they can trigger dozens of recordings every night.

The one surviving cub is still with its mother but is now about 11 months old so it may be encouraged to seek its own way in the world fairly soon.  In early October it was still usually close behind mother, as seen in this video.

Later in October junior was still in tow but was very distracted by something in the culvert, perhaps a strange smell.

Three hours later they returned but this time the cub was four minutes behind and was whistling loudly as it hurried to catch up.  There is a jump in the video as the cub has to re-trigger the camera.

In November the cub has been consistently farther behind and doesn't appear in the same 20s video clip, but triggers the camera separately as it hurries to catch up.  Here the mother is waiting and listening intently but eventually moves on, either not wanting to wait or because she can hear the cub is following.

The camera also saw a large single otter apparently fishing in the culvert on two consecutive days, although its prey is too small to be identified.  My guess is that it was catching small fish.  This may be a dog otter.

I will try an extra camera position soon to see if I can pick signs of the cub becoming independent.