Yesterday's Death's-head Hawkmoth disappearing off into the night after release
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 19, 2025 at 12:48 AM
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19th October
18th October
Far too windy for a full complement of mist-nets at the Bill today but tapped into a nice arrival of Goldcrests that made up 27 of the 61 birds ringed. Totting up of the totals also revealed that yesterday we broke the all-time Stonechat record - now 81 ringed this year (previous record 78 in 2024)
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 18, 2025 at 6:17 PM
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Death's-head Hawk from the Obs moth-traps this morning
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 18, 2025 at 10:05 AM
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17th October
Chiffchaffs firmly to the fore on the ringing front, totalling 72 of today's 116 birds ringed at the Bill: amazingly, more have now been ringed this September and October than in all but one whole year in PBO's history...and we're usually thought of as a spring migrant hotspot!
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 17, 2025 at 5:40 PM
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Nothing else really got a look in ringing-wise, but a Wheatear was the first for the month and a Firecrest only the fourth - our numbers of the latter have been far lower than at some other SW migrant spots
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 17, 2025 at 5:49 PM
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16th October
Progressively quieter on the ringing front as the anticyclonic conditions continue. Down to 60 new birds at the Bill today among which Chiffchaffs made up half the total; no surprises amongst the selection of other expected October migrants.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 16, 2025 at 6:03 PM
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Female Blackcap and Chiffchaff in the apple tree this evening. Migrant birds in the garden today: 7 Chiffchaffs, 6 Blackcaps and 3 Goldcrests, also several Robins
— Debra Saunders (@debbyseamist.bsky.social) October 16, 2025 at 9:27 PM
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15th October
With dreary, anticyclonic conditions firmly established, diminishing returns are inevitably setting in. However, it's the middle of October so just about anything's possible and today's utterly out-of-the-blue arrivals were a party of 6 Stone Curlews that looked as though they'd just flown onto the island when they were first spotted over the north end; after settling for a while the flock broke up and although there were later sightings here and there - some even wandering as far south as the Bill - they proved tricky to pin down and didn't aggregate together again. Apart from this exceptional event, today was for the most part a lower-key repeat of the week so far, with the Red-backed Shrike and Wryneck remaining at the Bill and 8 Black Redstarts, 2 Dartford Warblers, a Cattle Egret, a Short-eared Owl and a Ring Ouzel amongst others providing further scarcity interest there. On the ground, Chiffchaffs returned to prominence including upwards of 100 at the Bill, with late-ish singles of Redstart, Garden Warbler and Whitethroat of note amongst the back-up migrants; overhead, the usual suspects were all represented in decent supply, with 2 Merlins over the Bill and a lone Crossbill over the north of the island the best of the oddities. The sea was again carpeted in auks including an absolute minimum of 5000 off the Bill, where 21 Dark-bellied Brent Geese, 6 Arctic Skuas, 3 Sooty Shearwaters, 2 Pale-bellied Brent Geese, 2 Wigeon and a Manx Shearwater also passed through.
We've had some pretty good birds this year but to some extent most have been things that weren't all that shocking - if you walk around the Crown Estate Field often enough you're eventually going to stumble across a Booted Warbler (...it'll be a Lanceolated Warbler next) and if you spend long enough staring at the sea you're eventually going to jam a Fea's Petrel - but for sheer unexpectedness we're not at all sure that anyone would have chalked a flock of 6 Stone Curlews on their card for today, so we can well imagine Dave Foot's shock when he spotted these birds overhead. They were a fine sight in the air...
In the same way that some birds are inevitably going to turn up if you keep looking, so there are a few moths that we've always thought would eventually turn up at Portland - the question was always whether we'd live long enough to bear witness. Although its home range is a rather restricted area of heathland between east Dorset and Sussex, the Southern Chestnut has had just about enough of a propensity to stray away from the furze to pique our interest since it was first discovered in Britain in the early 1990s; however, it's quite a subtle moth so Jodie did well to spot last night's sub-optimal specimen in the trap she looks after in the Obs garden. By the look of the distribution map, this must be vying with Paul Harris' record from his garden at Upwey as the furthest west the moth has been recorded in Britain © Martin Cade:
Ringing numbers dropping slightly each day in the prevailing samey conditions: 77 new birds at the Bill today with 31 Chiffchaffs putting them firmly back at the top of the numbers; otherwise, only Blackcap made double figures but late-ish singles of Redstart, Whitethroat and Garden Warbler of note.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 15, 2025 at 10:07 PM
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14th October
A Robin and thrush day in the mist-nets at the Bill today, with 23 Robins, 16 Blackbirds and 10 Song Thrushes making up over half of the day's total of 92 ringed; Chiffchaff and Goldcrest reduced to just single figures each; third Dartford Warbler of the month the best of the oddities.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 14, 2025 at 11:42 PM
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Unexpectedly rammed-full moth-traps this morning although the numbers were mainly due to a huge increase in Large Yellow Underwings rather than quality migrants; a Clifden Nonpareil - the second of the year - easily the highlight at the Obs
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 14, 2025 at 11:24 PM
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13th October
Ringing numbers a wee bit depleted today because our third site at Culverwell was out of action but 103 new birds between the Obs and the CEF was still nice. Chiffchaff 31, Robin 18 and Gcrest 13 the top three, thrushes on the up, 2 Yellow-browed Warblers the scarces.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 13, 2025 at 6:38 PM
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12th October
Goldcrests on the up in the Bill mist-nets today - 29 from the day total of 148 birds ringed is more than double their previous best day so far this autumn; 49 CCs and 17 Swallows the day's other high totals, with 6 Stonechats and 5 Redwings also their highest totals for the season to date.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 12, 2025 at 7:33 PM
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11th October
So rewarding on the ringing front at the moment: another 233 ringed at the Bill today, with 97 Chiffchaffs and 80 Swallows making up the bulk of the total; 6 Redpolls, 2 Reed Buntings and a Firecrest the best of the less regulars with further interest in the form of a late Sedge Warbler
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 11, 2025 at 7:00 PM
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10th October
Big arrival of Chiffchaffs today and tapped into plenty of them in the mist-nets - 99 out of the day's ringing total of 179 at the Bill; this total also takes us over the all-time CC year record (now on 1393 for this year, previous record 1301 in 2012)...
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 10, 2025 at 10:48 PM
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...rare that the humble Dunnock gets a mention in our ringing summaries but its all-time record also fell today, with the 160th ringed overtaking the previous record of 159 in 2021. The first Redwing of the autumn and another Dartford Warbler also amongst the day's catch
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 10, 2025 at 11:02 PM
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Pelagic from Portland: 1W Caspian Gull, Sooty Shearwater, 5 Stormies, 3 Arctic Skua, pro. Pomarine Skua, Glossy Ibis S, Common Dolphin, Bluefin Tuna, 150 Med Gulls, 80 Kittiwakes, 250 Gannet, 100s auks + 3 Purple Sandpiper & lingering Black Redstart Harbour @naturetrektours pic.twitter.com/f01LDedBcc
— Tom Brereton (@tom_m_brereton) October 10, 2025
Overcast skies led to an uptick in moth numbers overnight, with singles of Toadflax Pearl catalaunalis and Golden Twin-spot the best of the migrants at the Obs; unseasonables included singles of Rosy Tabby flammealis and Small Fan-footed Wave
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 10, 2025 at 4:37 PM
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9th October
Perfect birding conditions and decent numbers of routine migrants which, together with the added bonus of 2 Common Cranes overhead, made for a pretty enjoyable day. Grounded arrivals noticeably increased and included 100 Chiffchaffs, 50 Blackcaps and 25 Goldcrests at the Bill, where 2 Dartford Warblers, a Snipe, the lingering Whimbrel and a Cetti's Warbler were the best of the oddities. Overhead passage was also strong, with 360 Meadow Pipits, 280 alba wagtails, 210 Linnets, 120 Siskins, 70 Chaffinches and 40 Redpolls making up the bulk of the numbers at the Bill; a lone Crossbill also passed over, whilst after midday the 2 Common Cranes that had arrived over the Bill from the west tried to leave out to sea before returning and eventually heading away north over Portland Harbour. The sea was quiet, with singles of Red-throated Diver and Balearic Shearwater the best off the Bill.
The two Cranes were very nearly a gripping semi dip from the Obs: Joe had tipped us off that they'd passed east over Abbotsbury but since very few larger migrants that pass over there make it out to Portland we had little expectation of them putting in an appearance; cue some panic a while later when we could suddenly hear Cranes calling to the east of the Obs but inexplicably couldn't get on them visually; however - and fortunately for us - they chickened out of making a Channel crossing and ten minutes later flew back in off the sea and eventually headed away north to the mainland © Jodie Henderson:
Ringing numbers on the up again at the Bill with 157 new in perfect conditions. Good arrival of 44 Chiffchaffs and 35 more Swallows the highest totals; 13 more Redpolls and the third Cetti's Warbler of the autumn the best of the variety. Ta Rob Stephens for the Cetti's photo from Culverwell.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 10, 2025 at 12:21 AM
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8th October
Another increasingly warm day with hardly a breath of wind saw reduced action on all fronts, with a short spell of drizzle associated with the passing of weak weather front coming far too late to drop us an any avian surprises. With Chiffchaff and Blackcaps noticeably depleted, things felt particularly thin on the ground, with the first Black Redstart of the autumn, a handful of new Song Thrushes, the first double-figure count of Wheatears for the month and a noticeable build-up of Linnets the only worthwhile reports from the Bill. Unsurprisingly, overhead passage made up almost the entirety of the day's numbers, with 200 Goldfinch, 140 Meadow Pipits, 135 Linnet, 110 'Alba' Wagtails, 100 Swallows, 70 Chaffinch, 60 Siskin, 26 Skylark and 2 Red-throated Divers over the Bill. At sea, 2 Arctic Skua and singles of Balearic Shearwater and Pale-bellied Brent Goose were also logged.
It was good to see a sudden build-up in Linnet numbers in the stewardship crops in the Crown Estate Field - there were only a few dozen at the beginning of the week but they'd upped to more than 300 today © Martin Cade:
We had a weird little event at the Obs during the morning when two Red-throated Divers flew high overhead calling as they went; we get plenty of Red-throated Divers passing by on the sea here but we can't recollect having heard before any calling in this manner - perhaps the seawatch birds are usually inaudibly distant?). The sound recording captures three progressively louder clipped wails (the inverted Vs on the sonogram) and a single gruff sort of cross between a goose and a heron (just before the third wail) but we haven't looked up to see how these calls fit with what's known of Red-throated Diver's vocalisations © sound recording Martin Cade and photo Jodie Henderson:
Today's weak weather front passed too late to jazz up the ringing numbers at the Bill - just 69 new at the Obs/Crown Estate Field (no nos received yet from Culverwell) with the best the first Greenfinch ringed this year - before the ravages of Trichomonosis we've ringed as many as 566 in a year!...
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 8, 2025 at 10:18 PM
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...also on the ringing front, a single Redpoll took their year total to 25 (all in the last 10 days) which is a new PBO record + the first migrant Song Thrush of the autumn was trapped
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 8, 2025 at 10:24 PM
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Again, far too clear and cool overnight for successful mothing: at the Obs, a single Toadflax Pearl the best of a limited catch of migrants; an unseasonable Swallowtail was an oddity there
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 8, 2025 at 10:29 PM
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7th October
Ringing gathered a bit of momentum at the Bill today: 180 new incl 74 Swallows, 22 Chiffchaffs and 18 Blackcaps; nice variety of other seasonable movers incl 7 Pied Wagtails, 5 Long-tailed Tits, 4 Redpolls and a Firecrest...
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 7, 2025 at 10:43 PM
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...also on the ringing front: we've received notification of a fantastic recovery of a Firecrest ringed here last October that was controlled a few days ago by a ringer in the Czech Republic - the first movement of a UK-ringed Firecrest to the Czech Republic or indeed to anywhere in central Europe
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 7, 2025 at 10:55 PM
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Last night's migrant moth catch not really up to expectations - stayed too clear and moonlit for too long? An Old World Webworm, 2 Olive-tree Pearl, 3 Vestal and 5 White-speck the best of the less regulars at the Obs.
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 7, 2025 at 2:51 PM
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6th October
Resumption of ringing activities today after the weather-enforced hiatus. Relatively quiet with just 66 new birds between the Obs, the Crown Estate Field and Culverwell; 15 CCs and 13 Bcaps the only numbers but 6 more Redpolls and the first Siskin of the year amongst some nice variety
— Portland Bird Observatory (@portlandbirdobs.bsky.social) October 6, 2025 at 10:27 PM
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5th October
Although it remained a fair degree too windy for a comprehensive check of the Bill, scrutiny of the more sheltered spots further up-island revealed pockets of cover that were teeming with common migrants - whether they were new arrivals or lingerers surfacing in the constantly ameliorating conditions was uncertain but the numbers were certainly impressive. The clearer conditions also saw an increase in birds overhead, with over 200 alba wagtails, 67 Siskin, 25 Swallows, 4 Redpolls and a Merlin over the Bill. The sea was busy with Kittiwakes - over 2000 passed the Bill in the hour after dawn - but otherwise uneventful, with a lone Great Northern Diver the pick of what little else was passing.
The mid-autumn this year has been fantastic for numbers of Chiffchaffs and Blackcaps in the better quality cover around the centre of the island that's been dripping with birds on many visits - since a lot of these spots don't get looked at from one week to the next, let alone one day to the next, it does make you wonder what rares are getting missed © Martin Cade:
With Long-tailed Tits rarely straying as far as the Bill, it's always a nice treat to come across little family groups when birding further up-island; of course, where there are Long-tailed Tit flocks there's always hope but sadly there were no Yellow-browed Warblers or better in their wake today © Jodie Henderson:
4th October
With a raging and unabating westerly the order of the day there was little to report. Singles of Long-tailed Skua off the Bill and Sooty Shearwater off Chesil Cove were the only slightly out of the ordinary reports from plenty of seawatching and a Merlin at the Bill the only worthwhile sighting on the land.
3rd October
The nets @portlandbirdobs.bsky.social remained firmly furled today as Storm Amy hit us with rain and gusts up to 48mph by evening.A good time to reflect on 12 brilliant days of ringing, good numbers and variety. Autumn Chiffchaffs always reflect a change of seasons and Wrynecks confirm the feeling.
— Peter J Morgan (@pbo61.bsky.social) October 3, 2025 at 7:55 PM
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2nd October
SSW wind with overcast did 1little for birds with 68 birds of 12 species ringed. CC 19, Gcrest 6, Meadow Pip 26, 2 Reed Bunts new. A Restart a suprise luckily for a visiting group of nature supporters on a visit to PBOn,End to days of migrant movemant comes, thanks always due to Martin & Jodie.
— Peter J Morgan (@pbo61.bsky.social) October 2, 2025 at 10:34 PM
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1st October
The Wryneck was very obliging today. portandwey.blogspot.com/2025/10/1-oc...
— Port and Wey (@portandwey.bsky.social) October 1, 2025 at 11:32 PM
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Fine October autumn fare of 1sty male Dartford W, 7 Redpoll and 5 Goldcrest were among 124 birds of 16 species ringed @portlandbirdobs.bsky.social today. Meadow Pip 43, CC 41, Bcap 12 highest in slow day with weather clearing and reaching 18 degrees in the afternoon. Red sunrise spectacular.
— Peter J Morgan (@pbo61.bsky.social) October 1, 2025 at 8:23 PM
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2 Sandwich Terns at Ferrybridge at dusk. Also one knot.
— Steve M (@steveweynature.bsky.social) October 1, 2025 at 9:44 PM
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