Another prominent Blackcap and Chiffchaff day with at least 15 Blackcaps of which six were around the sunny bramble bank near Flycatcher Tree. At least 25 Chiffchaffs were scattered around the reserve. There were also lots of Swallows moving through and pausing to feed low over the Flooded Fields and Warren Flash.

Jays have become much more visible in September as they’re foraging for and burying acorns but maybe also some migrants moving through. I saw at least four today. A single Raven cronked as it went overhead and one of the Ospreys was again over De L’Orne as I appeared from the end of the Main Hedge.

One of the local juvenile Marsh Harriers drifted low over Black Water before landing in the reed bed opposite and lots of alarm calls and birds in the air alerted me to a Sparrowhawk on the fence posts out from De L’Orne hide.

Only three species of butterfly today, Speckled Wood, Red Admiral and perhaps the most numerous and freshest were the Small Coppers.

It was great to see the White-tailed Eagle, reasonably close over Black Water as Adam, Steve and I attempted to bring in two of the tern rafts. The water levels are still low for this to be possible so we’ll have to try again after some heavy rain. Four Spotted Redshank flew in to De L’Orne lagoon as we were working and a single House Martin drifted overhead.

I finished with a visit to the Sailing Club to change the AudioMoth bat detector batteries. I analysed the data later and was thrilled to see that a Greater Horseshoe Bat flew past the Warden’s Hut at 11:30pm on the 19^th September 2021. This is a significant record for Hampshire and has been confirmed by the Country Recorder.

From the Sailing Club there were two Sandwich Terns roosting on the mud towards Inchmery and a reminder that winter is on the way was provided by a Bar-tailed Godwit roosting near the terns, two Rock Pipits by the Sailing Club and 18 Brent Geese in the river mouth.

A very brief visit this morning as I was heading to Slimbridge later to go moth trapping with Peter. I walked to the hides first. There were at least 15 Yellow Wagtails with the cattle in the Wedge Field showing a variation of plumages across ages and sexes.

Yellow Wagtails

You can see the eastern end of Black Water from the side window in the new De L’Orne hide and from here a Little Grebe ventured close.

Soon afterwards a Water Rail squealed and then dashed across the gap between the reed beds.  

Ten Greenshank flew across the lagoon and a single bird dropped on to the mud in front of the hide.

An over mature female Common Darter landed on the track near Gravelly Crossroads, the darkest one I’ve seen. The lower part of the visible eye is not showing any signs of the bright blue colouration which is a key characteristic of Red-veined Darter.

On the new islands three Snipe and two Little Egrets were resting. Everything went up from the scrapes as one of the Ospreys drifted close to the lagoon, it hovered briefly and then dropped down to the river. It was high tide which was part of the reason why the Osprey was fishing so close to the scrape and also why several waders were also on show, 13 Redshank, 3 Black-tailed Godwit and 3 Dunlin.

A quick stop in Black Water hide produced a silent Spotted Redshank heading over to De L’Orne. A mobile Green Sandpiper moved between De L’Orne flood, the back of De L’Orne lagoon and then on to the muddy fringe in front of the newly cleared NFOC hide.   

Mist and dew made this morning feel very autumnal. I walked the fence line through the beach gorse and one of the first things I noticed was something caught on the barbed wire flapping and trying to free itself. As I got closer I could see that it was a Convolvulus Hawk-moth, a rare but regular migrant to northern Europe from southern Europe and Africa.

It was attached fairly strongly to the barbed wire but it wasn’t caught on the barbs. It was almost as thought it was caught in a spider’s web. I freed it and it seemed fine. I also considered that it might be a shrike larder but it was 6.45am about 3 minutes after sunrise, the moth was covered in dew and in perfect condition. It wasn’t skewered to the barbed wire and so I think it got stuck overnight somehow.

Once I’d freed the giant moth I turned to see a pair of Roe Deer watching me intently through the thick fog.

There was a large group of noisy Canada Geese offshore with 215 strung out from Mary Monts. Eight nervous Snipe were flushed from the pools.

Today was a Blackcap and Chiffchaff day with plenty of them on the move and lots of ‘chacking’ and ‘hueeting’ wherever I went. There were at least 20 Chiffchaff fly-catching in the large trees bordering Gravelly Track. On Great Marsh a Sedge Warbler appeared briefly.

My first Marsh Tit since May was eating berries near the Reedy Ditch.

A hirundine flock was assembling on the wires opposite Black Water House. It had become so foggy that it was difficult to tell what they were but there were roughly 275 birds with around 225 of them House Martins and perhaps 30 Swallows and 20 Sand Martins.  

In a hidden clearing of heather along Warren Lane Beach Scrub Ian had found a colony of blue butterflies. It was warm now so I had a look. The Common Blues were pretty fresh but a smaller Brown Argus was very faded, both species are double brooded and they can be seen in late September. Compared to Common Blue the Brown Argus lacks a spot on the underside of the forewing nearest the body and unlike Common Blue and Silver-studded Blue they also have two spots very close together on the hindwing which almost coalesce to look like a number ‘8’. Brown Argus is a patch tick.

There were also lots of fresh Small Coppers in this sheltered area and a Rush Veneer, a migrant moth which is often found at the coast.

I walked to the hides and noticed the Osprey heading over the De L’Orne area. A second Osprey was visible in its normal tree in the Calshot Tower direction.

As I reached De L’Orne hide I could see the Great White Egret stood on the top of the pines at the back of Black Water. After a few minutes he took off and headed back towards the Reedy Ditch area. August and September are good months for new egrets arriving and since the first sighting nearly three weeks ago the Great White Egret has ranged widely from Park Shore and Great Marsh to De L’Orne and most areas in between.  

The White-tailed Eagle appeared again having been seen returning to the Isle of Wight earlier in the month. He appeared from the Gins East direction and was immediately harassed by one of the Ospreys before landing in the fields on the Inchmery side and then later landing on the saltmarsh opposite the Royal Southampton Yacht Club.

Before heading home I chatted to Alan and Caroline. The Southern Migrant Hawker didn’t appear but while we were talking Alan noticed a Clouded Yellow heading eastwards along the ditch near the car park, only my second on the reserve.