Jun Hosoya

I'm a birder, bird-bander and I'm mainly targeting shorebirds and passerines and owls in the northeast of Japan.🦉

[Jun Hosoya @junhoso266]

A Ruddy Turnstone released by me in Miyagi, Japan, was seen on 11 Feb 2026 near Koné, New Caledonia. Amazing that a bird from my local area reached the South Pacific — perhaps even hanging out with Kagu!
Thanks to Liliane Guisgant and the SCO for reporting this Record.

[Jun Hosoya @junhoso266]

I recaptured the bird. Holding the same bird I tagged last year, realizing it had traveled such an incredible distance and returned— I was overwhelmed with wonder and emotion.

[Jun Hosoya @junhoso266]

One of the Dunlins we tagged with a GNSS logger last winter has returned! The bird completed a round-trip migration of at least 13,500 km between Miyagi, Japan and the Arctic coast of North America—an incredible journey for a 60-gram bird. Truly amazing!

[matt prior @mattthesparrow]

Every now and again we catch a bird that really surprises us. Yesterday it was this Reed x Sedge Warbler hybrid. It is a very rare occurrence. I have never seen one before, and may never see one again.

[Jun Hosoya @junhoso266]

2024/5/1 The Solitary Snipe (Gallinago solitaria wintering here) just before migration is working hard to accumulate fat. Where do they migrate to? There are few of them remaining in my study area. Now, many Latham's snipe (Gallinago hardwickii) have arrived here to breed.

[Richard Donaghey @CausewayBirds]

A bumper wader catch on the Bann Estuary last night with 87 new birds of 8 species + a retrap. Turnstones tend not to venture up the estuary, so these were the first caught at the site. It was a good night all round for the team of 6, gaining new experience & handling new species

[WWT @WWTworldwide]

Sir Peter Scott - ornithologist, conservationist and founder of WWT - was born on this day 113 years ago.

Scott realised that Bewick's swans have their own unique bill patterns, much like fingerprints.

Here are some of his bill pattern studies! 👇🎨

[nicola crockford @numenini]

New record count: 1587 Nordmann's Greenshank (>est. world popn of 1300!!) at Tiaozini, Yancheng, China's Yellow Sea World Heritage Site, by Hongyan Yang, among rich tapestry of 115117 birds of 42 spp. Great news ahead of World Coastal Forum, Yancheng 25-27 Sept. #BirdsSeenIn2023.

[Jun Hosoya @junhoso266]

I have been studying albatrosses in the northeast region of Japan off the Pacific since 2014. One of my main goals is to determine the mysterious breeding site of some Short-tailed albatrosses that are not ringed. #WorldAlbatrossDay

[Jun Hosoya @junhoso266]

I made a mistake. It was originally ringed 24th Apr 2022.

[Jun Hosoya @junhoso266]

Several Solitary Snipes are remaining yet. I recaptured a Solitary Snipe on the 23rd, originally ringed at the same place (25 m away) in a year (24th Apr 2023).This individual has almost finished its moult and stored its fat (161.6 g). They might go to breeding areas in a week.

[Jun Hosoya @junhoso266]

We caught and banded 13 species and 35 birds last Sunday in Sendai-city, Miyagi Pref. Japan, including two Redーflanked bluetailes. What fantastic birds.

[Jun Hosoya @junhoso266]

A Ruddy Turnstone flagged at Torinoumi Miyagi Pref. Japan was resighted in Lord Howe Island, Australia, on 9th October 2022 by Mr. Liam Murphy!
It's 7,900 km from our site, but it must have flown from the low Arctic region, so it must have been more than 10,000 km.

[Jun Hosoya @junhoso266]

A Red-necked Stint resighted in Thailand! I captured this bird on 21st Sep 2019 at Torinoumi Miyagi Pref. Japan as Juvenil. On 12th Oct 2022, Mr. Thanakrit Khamsanoh resighted it in Baan Pak Talay, Ban Laem, Phetchaburi, Thailand. It has been 1117days and 4800 kilometres.

[Jun Hosoya @junhoso266]

I know many birds can be identified by the shape and length of thier bill. Still, the slightest difference in angle can make them look complately different! These 3 photos are all of the same individual (Lesser Sand-Plover)

[Jun Hosoya @junhoso266]

I'm happy to participate in this important article about shorebirds, recently published in Oecologia. The article uses stable isotope from shorebirds' feces and breath to infer shorebirds' diets through feeding and field experiments.
https://t.co/NlU2HOZwe5

[Jun Hosoya @junhoso266]

@Jamesoneillii I thought woodcook was much heavier. But I looked it up, and it was just as you said!

[Jun Hosoya @junhoso266]

One of the snipes I caught last night seems ready to go toward the south. The fat score was 4(Meissner 2009), and the weight was 217.5g!

[Jun Hosoya @junhoso266]

@Jamesoneillii Yes, it's cool! It's Swinhoe's snipe (Gallinago megala). in my data, in hand now, average weight is 182.5g, max=264, median=188.5, min=102,n=32

[Jun Hosoya @junhoso266]

5th Sep 2022. Swinhoe's A2 and Latham's snipe J1. Can you identify?