Birds on trail cameras

Birds account for most of the "non-target" triggers on the trail cameras, mainly pigeons, ducks, geese etc.  The advantage the cameras have is that they are watching all the time, so they see things that would otherwise be missed.  The videos can also show us natural behaviour in an undisturbed environment, something else rarely seen.

Bitterns have been causing great excitement in Gosforth Nature Reserve this spring with at least one booming male and at least one female.  Hopes are high that they may breed in the reserve for the first time.  Most of the time they are hidden in the reeds but this one, probably a female, went for a wander in front of the cameras last week.

And then it happened again a couple of days ago.  The bittern walked past three cameras and was a bit too close by the end.  It appeared to pause when it heard a sudden burst of song from a Cetti's warbler close by in the reeds.  I was interested to see that it stood tall and still when out in the open, just as it does for concealment when it is in the reeds.

Another recent recording showed an adult male Redstart, a summer visitor to the UK and a rare record for the reserve.  This one was presumably en route to a breeding territory farther north in upland woodlands.

And this is what I am seeing most of the time.  There are several Mallard, Canada Goose and Greylag Goose families in the reserve and they spend a lot of time using up camera memory and battery power.  This is a brief excerpt from a prolonged visit from the greylags.

A BIG surprise on OtterCam

It's only a glimpse but is on two cameras and well worth a look.  The dog otter went past with a huge eel, almost as long as himself.  What a pity he didn't stay to eat it in front of the cameras.  I have slowed both down to quarter speed to make it easier to see the action.

Basil Dean, an Environment Agency specialist in river restoration and currently seconded as a Development Manager to the Ouseburn Way project, says he has long suspected that there are large eels in the lake as the habitat is perfect for them, so it is good to have proof.  My cameras have previously recorded otters with fish, a rat, moorhens, ducks, frogs and now an eel.  As long as it is meaty, if they can catch it they'll eat it.

Eels are a favourite food of otters but I expect most of those they catch are smaller than this.  I can't imagine that he could eat it all in one go and I suspect he didn't need to go fishing for another night or two.  The European eel population has declined by 98% over the past 40 years and the species is now on the IUCN Red List.  And it's not because otters are eating them all - the principle causes include pollution, loss of habitat, climate change and physical barriers to migration, so it is good to know that this is somewhere they can thrive (if they stay out of the reach of the otters).

In other news, as they say.  The otter cubs are still with their mother, or at least two of them are. The last time the cameras saw all three plus mother was 10th April but I can't tell if the two are always the same two.  The cub with a bad leg is still there and is almost back to normal.  The cubs are now 10 months old and are likely to disperse soon, perhaps this month.  I think all three are still around because I am often seeing a solo otter (not the dog) and quite often it is whistling a contact call.  It could be that one (or more) is already semi-independent but still in the territory. Here are all four in April - the middle cub is the one with the limp but you can see it doesn't look too bad.

And here is the latest play fight.  When it involved three cubs the mother always joined in but this time she just let them get on with it.  It's a bit disjointed as a lot of the action was off camera and it was a misty night with some of the cameras a bit steamed up but it looks like fun.

The previous three litters all left at about 10 months of age and each time it seemed that the mother initiated it by courting the dog otter.  From the timing of things I suspect that the present female has been the mother of the last four litters but I can't be sure.  Female otters generally only live long enough to have two or three litters so, if I am right, it may be that this female won't breed again.  It will be interesting to see what happens in the coming weeks.  More news soon.

Feeding the birds

I expect you have seen the latest recommendations from the BTO on feeding garden birds.  The new guidance is to stop feeding seeds and peanuts from today to the end of October in the hope of reducing transmission of trichomonosis which has caused declines in populations of chaffinches and greenfinches.

The problem is widespread but seems a bit less up here compared with farther south.  This graph from the BTO Garden BirdWatch shows the reporting rate for greenfinches in the North East.

Compare that with the South East.

These are similar data for chaffinches.

I don't remember ever seeing a finch on the peanut feeder so I think I'll continue with peanuts until they are all used up and see what happens.  That will be a relief to the woodpeckers who will be here with their fledglings in June.

I reckon I only see about one sick finch a year here.  One effect of stopping feeding is that all the finches will disappear so recording of both healthy and sick finches will presumably plummet but I expect the BTO experts have thought about that.  I'll be disappointed not to see the birds but I guess it is all for the greater good.

At the moment I still have lots of siskins, redpolls, bullfinches, greenfinches and chaffinches outside the kitchen window.  They are going to be very disappointed.

My prize visitor, a brambling, was only here for a week before setting off home to Scandinavia about three weeks ago.

Assuming most people comply with the advice it's going to be interesting to see what happens, both here and nationally.  I expect I'll be getting complaints from the local clean-up squad as well.