Drone Fly

-

 Wow ! This is blog number 101 since I started in January. I thought I would run out of things to say but there is still a lot going on - so I'll keep on going!

I came across this wonderful fly this week and saw it walking on the water in a stream. You can see the small depressions in the surface tension that keep it afloat. This fly mimics the honey bee that it superficially resembles. ( lots of advantages - access to honey and predators might think it could sting).

This is a fly not a bee . You should be able to spot that it has only one pair of wings (don't be confused by the shadow of a wing on the surface of the water). The larvae of this fly develop in stagnant water and lie under the water with a long breathing tube or snorkel that allows them to hide. This body shape has led to the larvae being referred to as "rat tailed maggots".



Diary
We had another sighting of the female stoat dragging the body of a baby rabbit past the window and across the little lane by the house.  So far we haven't located where she has her den but it looks like she is disappearing into an old dry stone wall.
There has been a bit of a growth spurt in the vegetation. I am seeing pignut in the meadow and saw my first wild orchid of the season today ( an early purple orchid I reckon)


Comments

Post a Comment

Popular posts from this blog

The Dunnock

-
Image
 When I was a boy my first bird book described "hedge sparrows" but at some time in the last 50 years this name has all but disappeared and these birds are now called dunnocks (as they are not closely related to House and Tree Sparrows) Its easy to miss a dunnock! They are little brown birds and they tend to feed on the ground and keep to the cover of vegetation if they can. The males are territorial and the birds pair up in the spring. The pair are not strictly monogamous and the female will mate with another male if she gets the chance. DNA testing reveals that a brood often has more than one father. The male dunnocks are alert to this possibility and can sometimes be seen pecking at the cloacal opening of the female in an attempt to get her to expel the sperm of the competitor. The sexes look alike and these birds are common and widespread in Britain. The males get involved in feeding young according to their breeding success so it is common to find two males and one femal...
Read more

White Clawed Crayfish

-
Image
 I went for a walk yesterday that took me along the Scandal Beck (a tributary of the River Eden). On the banks of the river was a stone that had obviously been used as a picnic table by an otter and the remains of his meal were strewn about. A recognisable part of the leftovers is shown below. It's clear that this claw comes from a white clawed crayfish. These animals are not common in the UK as they need the water to be rich in calcium. This requirement is fulfilled in the Eden valley by the limestone substrate. I think that the River Eden is as far North as theses animals get. I know that there are crayfish in this part of the system because for a number of years I have volunteered with the Eden Rivers Trust to survey them. It was not uncommon to find a couple of hundred animals in a 300m stretch of river. The following images give an indication of scale. In recent years the population of the native white clawed crayfish has been threatened by the arrival of the invasive signal (...
Read more

Otters

-
 Well another Covid lockdown! As I am confined to the local area I have been having a closer look at the local wildlife. I treated myself to a trail cam and started to see what I could find. After a couple of experimental sessions to get to know the kit I set the camera along a fence line by an old railway track. On the first night I was astonished to get footage of an otter carrying a rabbit! The site is at least 500m from a watercourse which is a drainage ditch that eventually flows into a tiny tributary of the River Eden I hadn't realised that otters eat anything other than fish but apparently they do. I wonder why the otter was carrying the rabbit rather than eating it where it was found. Perhaps it was feeding young? Apparently ottters have young throughout the year. I have only seen an otter near the house once before and that was a late night encounter in the car headlights.
Read more