Titchfield Haven - Bird Ringing 18th August 2012

A busy mornings bird ringing at the haven today, with over 130 birds captured, our highest daily total of the year so far, which was good since it coincided with the second of our public ringing events, so there was plenty for them to see. The total was dominated by Sedge Warblers again, with 51 birds ringed, but alas, still no Aquatic!!! Reed Warbler was the second most numerous species with 42 birds ringed, the catch of both species included a large percentage of adult birds.

Grasshopper Warbler was the third most numerous species; 10 birds were ringed, but unlike with Reed and Sedge, we have yet to catch an adult bird this year. Other species included seven Willow Warblers, five Garden Warblers, four adults and one juvenile and a couple of Common Whitethroats. We did also catch three Blackcaps, two of which were retraps, one, an adult bird from a couple of years previously which was in heavy wing moult and in the process of replacing all of its primaries and secondaries, so he won't be going anywhere for a while.

Today's bird of the day though was not in the nets, but flying over them, and took the form of an Osprey. This bird has been hanging around for a while now and tends to hunt along the River Meon catching Mullet, and once it has caught, it flies over to the Isle of Wight to eat...seems a long way to go for lunch, especially when there is an Osprey platform at the haven specially for it!

Osprey being dive bombed by a Common Tern

After ringing I headed back to the centre to look at a Jersey Tiger moth that was trapped at the haven overnight. This is the first time this species has ever been recorded at the site, and what a cracker it was too! There have been a few caught along the south coast over the last few weeks...think I will have to dust off my moth trap tonight.

Jersey Tiger, Titchfield Haven

Whilst looking at The Jersey Tiger I took the opportunity to get a close up look at a dead Water Shrew that had been found the day before in the Ringing Area. This is the largest of the British shrew species and is distinguished from the other species by virtue of its black dorsal fur and whiter underparts, and of course its larger size.

Water Shrew - Titchfield Haven

Water Shrews feed on a variety of aquatic and terrestrial invertebrates plus frogs, newts  and small fish, apparently they attack their prey at or just behind the head and can take prey considerably larger than themselves. Larger prey are immobilised by a venom which is produced in the saliva by the submaxillary gland. The venom affects the nervous, respiratory and and blood systems. 

Water Shrew teeth

I was intrigued to see the colouration of the tips of the teeth, apparently the red tipping is due to the deposition of iron in the outer layer of the enamel, and it is considered that it may increase resistance to wear.

A mixed bag of bits and bobs...

Saturday 31st was a real mixed bag that started with a look thorough my moth trap and finished with a bit of bird ringing in the garden. It has been a few days since I was last able to run my moth trap, which unfortunately also coincided with the weather returning to a more seasonal cold and overcast type, which sadly the catch reflected. Only 22 moths of five species were captured, but that did included three Oak Beauty's and an Early Grey, the latter being the first for the year.

Oak Beauty

It was then off to Botley Wood for some bird ringing and hopefully the chance to catch some new arrivals....but alas that was not the case. In fact ringing was pretty poor with only four new birds captured, although one of those was a new Chiffchaff. 

Pollen Encrusted forehead of Chiffchaff

This bird was clearly a migrant that had wintered in warmer climes since it had pollen encrusted around its bill and on its forehead, and there isn't mush of that around in the UK in the winter. This bird had also lost half of its tail, presumably during migration since it was nearly half regrown. The old half of the tail, was not particularly heavily abraded, although some chips were present, and the feathers were broad and rounded, so based on my experience last week, I was included to age this bird as an adult. All of the wing feathers were of the same generation too, which tended to back that up.

Tail of Chiffchaff

A retrap Robin, was not a pretty site, since this bird too had lost a load of feathers, this time around its head, which apparently is usually a result of an infestation of feather mites or the bird being diseased...poor thing.

Balding Robin

This bird was originally captured as a first year bird in May 2011, so I knew that it was an adult bird which would have undergone a post breeding moult at the end of last summer. It was therefore interesting to see the presence of some pointed tail feathers mixed in with the adult ones. These feathers were fairly broad and all of the same generation, except for one which was still regrowing, therefore would have been replaced last autumn....I think this is another example of being cautious when ageing Robins.

Tail of Adult Robin

Whilst waiting by my car for the next net round I noticed the surface of the water in a ditch next to where I had parked rippling, and a strange white ball moving around rapidly under the water. So I sat for a while watching it before figuring out what was going on, a Water Shrew was running along under the overhang of the ditch, before darting into the water to hunt beneath its surface. With the water being so clear it was possible to watch it feed beneath the surface, which was amazing. It was possible to see that when beneath the surface the shrews whole body was enclosed within an air bubble, which is why it looked like a white ball! It was a strange beast that reminded me of a miniature Duck-billed Platypus beneath the surface. Unfortunately the shrew was moving so quickly there was no chance of a photo, but below is a picture of its ditch.

Water Shrew Ditch

With the ringing proving to be so poor it was time to close the nets and go for a stroll, Slow-worm's were slow and lethargic due to the lack of any sun to bask in.....

Slow-worm

                      ..................and invertebrates were slow and approachable, which was ideal for grabbing a few pics for later identification. Eupeodes corollae (if I have id'd it correctly) is one of the commonest hoverfly species of open habitats and its numbers are often swelled by migration and/or mass emergence in late summer.

Eupeodes corollae

It was back home for the afternoon and after a bit of uncustomary DIY, I opened a net for the last few hours of daylight. Three new birds was all that was on offer, two Greenfinchs and an adult Wood Pigeon.

Scary Eyed Wood Pigeon

Wood Pigeons are pretty much at plague proportions around my area and are very unpopular with garden bird feeders due to the large amounts of food they consume. This individual was obviously not expecting my net to be open, and I think I was lucky not to end up with a big hole in my North Ron Super Fine!