Welcome to this blog, where you will find regular updates about the exploits and activities of the Axe Estuary Ringing Group. Please browse through all the pages on the blog, where you will find more information about the Group, the area, and how to get involved.
Saturday, 9 May 2026
Sunday, 3 May 2026
News from behind the sand martin wall - 29th April 2026
Saturday, 2 May 2026
Ripples to Reeds Event
Friday, 1 May 2026
Crop Field Ringing 19th April - Breeding is under way!
We had our first session of the breeding season down in the crop field area. It was a very cold start but developed into a particularly beautiful day weather wise (though a little too bright and sunny for ideal ringing conditions), as you can see from a picture of the busy team for the day (minus myself).
I had cleared some new rides in the Colyford Common reed bed for us to use and we set nets in our usual areas otherwise. The reed beds are still a little quiet as yet, but the new rides did catch us a few birds including a reed warbler, one of our target species, and a swallow. Overall it was quite a productive day for the four of us, with a good mixture of birds including some we don't catch particularly frequently which is nice, especially when they may be locally breeding.
Our total for today, of 41 birds encountered, is given in the table.
New Birds Retraps Total Blackbird 1 1 Blue Tit 1 1 Cetti's Warbler 2 2 4 Chaffinch 2 2 Chiffchaff 4 4 Dunnock 4 4 Great Tit 3 3 6 Greenfinch 2 2 House Sparrow 1 1 Linnet 2 2 Long Tailed Tit 1 1 2 Reed Bunting 1 1 Reed Warbler 1 1 Robin 3 1 4 Sedge Warbler 1 1 Stonechat 2 2 Swallow 1 1 Wren 2 2 Total 30 11 41
As always at this time of year we are looking for signs that the birds are breeding locally. We check the birds for signs of cloacal protuberance and/or brood patches. We can use cloacal protuberance to relatively easily sex some of the birds as male, and we can use the extent of the brood patch to sex some birds as female. We also look for these indicators in birds we can sex by plumage so we have some idea whether they are breeding in the area or are passing through, perhaps still migrating north.
The picture below shows a greenfinch we have sexed as female based on her plumage with a very obvious and clearly defined brood patch.
The unusual birds for us included the two linnets, which we catch one or two of per year. The bird on the right, though with very little pink colouration, is a male, while the bird on the left is female. They were caught side by side in the same net. The female was starting to develop a brood patch, though there was no sign of cloacal protuberance on the male.
Similarly swallow is a bird we might expect one or two a year, though I always think we should perhaps get more as they skim over the reeds.
The sex of a swallow can be determined by the relative lengths of the tail feathers. A male has longer 'streamers' which is effectively the length of the outer most tail feather. We measure the difference in length between the outer feather and the feather next to it and/or the shortest tail feather. This bird has relatively short streamers and was sexed as female.
Stonechat feel as if they are increasing in numbers, and we have a pair or two breeding. The stonechats we caught today were both male, but there was also a female collecting nesting material just by where we were ringing.
House sparrows are very nice to catch, and this area is one where we might expect to catch at least one most sessions. They travel down from the local houses (in the back of the linnet photograph) to feed in the grassy area in the old crop field and are readily caught moving between bramble bushes or in the gateway between two hedges.
Another interesting record was a reed bunting which we caught for a second time, having caught it initially in the reed bed by the Discovery Hut during one of our evening roost catches. This suggests this bird does not move much! It was showing signs of breeding and we also saw a female collecting nesting material.
So overall a very interesting session which gave us some good indications as to what is happening in that area of the reserve. We will be visiting again shortly so will keep you updated!
Sunday, 12 April 2026
Mist netting 10/4/26....the migrants are here!
| A very well travelled 10+ year old Reed Warbler |
| Reed Warbler wing |
We caught three Willow Warblers, our first of the year. They also migrate to sub-Saharan Africa for the Winter. Adult Willow Warblers undergo two complete moults each year, one after breeding before leaving the UK, and one whilst in their wintering quarters in Africa. The juveniles undergo a partial post-juvenile moult, and then also complete a full moult in Africa before returning. Therefore, there is no way to age a returning Willow Warbler.
| Willow Warbler |
| Willow Warbler wing |
Willow Warblers are often more yellow and have paler legs than a Chiffchaff. However, there's a lot of individual variation, and some can be hard to tell apart. Before ringing, it is therefore necessary to correctly identify which species you have. This is done by looking carefully at the Primary feathers. On a Willow Warbler, the outer vane is emarginated (ie narrows) only to the 5th Primary feather, whereas on a Chiffchaff the 6th feather is also emarginated. As the wing shape is also slightly different, the length of the 2nd Primary on a Willow Warbler is roughly the same length as the 5th or 6th Primary, whereas on a Chiffchaff it would be about the same as the 7th or 8th.
| Willow Warbler wing |
| Chiffchaff |
We also caught the Group's 21st Woodpigeon, an adult female with a large brood patch, indicating that she's actively breeding.
| Woodpigeon |
| Woodpigeon uniform adult wing |
One Reed Bunting was caught, which had been ringed as a young male on 2/11/25.
| Male Reed Bunting (age code 5) |
Ringed | Retrapped | |
Reed Warbler | 1 | 2 |
Cetti’s Warbler | 1 | 1 |
Willow Warbler | 3 | |
Blackcap | 7 | |
Sedge Warbler | 5 | |
Wren | 1 | 1 |
Reed Bunting | 1 | |
Chaffinch | 1 | |
Blackbird | 2 | |
Chiffchaff | 3 | 1 |
Blue Tit | 1 | 2 |
Dunnock | 2 | |
Wood Pigeon | 1 | |
26 | 10 |














