Thank you.
M4 was recorded by you 8 days ago, ringed on 10-Nov-2018.
UW was ringed on 28-Sep-2022 as a 1st winter bird, recorded 6 times at Mai Po, including one sighting from you in Feb.
Most likely Z4. It was ringed on 20 Sep 2021. It was recorded 38 times from Sep-21 to Apr-22 and Aug-22 to Apr-23, and then in Aug-2023. All records from Mai Po except once in Tsim Bei Tsui.
Whimbrel AA is a nice record: it was ringed on 7-Oct-2018 as a 1st winter bird. Reported from Tsim Bei Tsui in Mar-2019, at Mai Po in Sep-2020 and Feb-2023. Earlier this autumn on 19-Aug-23, it was recorded on a mudflat area in Hwaseong City, South Korea. Glad that it is now back to Mai Po.
Common Greenshank C3 was ringed on 8-Nov-2021. It was reported 31 times since, all records from Mai Po. You have reported this bird before in Apr-2023.
Cheers,
Katherine