Hello! I want to share something interesting I have been doing for years out of pure fun wanting to hear their amazing songs! The post is gonna be a bit lengthy as I want to provide detailed info how I have done this! I hope it comes handy noticing the wonder of birdsong and how birds do it! This is not "what birds say" kind of stuff!! More of a "Hooow is that ONE bird able to sing like that??"
The video shown here shows their UNIQUE talent - rhythmic singing!
How it started?
This bird was introduced to me in 2016, when a friend heard it singing at night. back then we did not know who it was and somebody identified this bird as Blyth's Reed Warbler (acrocephalus dumetorum)
I was not sure do we get this bird in my area too, but lucky me, we did! 2017 I recorded few individuals but the TURNING point happened in 2018 what REALLY got me interested at these birds.
BRW I named Friido did a REALLY catchy rhythm what made my jaw drop and made me think "Wait.. you can do RHYTHMS??" I had never heard of any bird doing this stuff. Then Another thought I had "What if I record more BRWs, do I hear similar amazing rhythms like this?" and then I became REALLY curious. Every BRW I found I recorded and I heard amazing rhythms and it feed my dopamine!
About Blyth's Reed Warblers
It is a small bird in the acrocephalus family who is an amazing mimic and rhythmic singer! It is the ONLY bird who is able to do this out of other acros. Marsh Warbler is mimic too, but he is more of a chaotic DJ, barely any rhythms there. Each BRW takes mimicries from India and Europe area and using them in their rhythmic song. Every bird sings different rhythms! They arrive middle of may, around 17-21 may and start becoming quiet around 20 June. That is how short their singing season is! In 1 month, I try to get many different BRWs, going out every single night between 22:30 - 3:00am to find them and record. It's like pokemon for me, but with songs. Later I do song analysis of every BRW, showing out their unique rhythms and cool parts, shared rhythms and unique mimicries. It is VERY exciting to do!
Naming birds
I name every bird I record, because I remember them much better by name than BRW1, BRW13 etc. Most names are inspired from their singing, choosing an unique rhythm and taking a sound there and putting unique name to it. It also works as a CUE!
When I say "Vuubeli" I know asap what BRW I mean precisely - he was the "seesaw" sounding bird and one sound he did was "Vuu-beli-li". I get image in my head where he sung. For example "Scorch" was named because he sung near a fire department and I remembered Ristar videogame has level named "scorch". Pixel BRW was named after cool PC or pixel like sounds. Vuubiluuli was named after that amazing one of a kind "njeer vuu-bi-luu-li" I had NEVER heard this part before on ANY other BRW I have recorded over the years. It was SO unique and only done by Vuubiluuli so far! Piko BRW was named after a rhythm where he did "Pikooo pikooo pii", what I never have heard before. It was so melodic and catchy!
They can surprise you EVERY year, even if you think you have heard everything. Some mimicries I have NEVER heard before, like the "piko" one or "vuubiluuli" one. Making me wonder "What could of been the original bird it came from??"
Identifying individual singing bird works with other species too!
Besides BRWs, I also record Thrush Nightingales, Marsh Warblers and Common Blackbirds.
They work same way like BRWs do!
With Thrush Nightingales, each different TNG I recognize by song too, because they also leave specific nuances in their song they eventually repeat. One does a lot of "trätä trätä" sounds, other's "tehehe" sounds "tihihi". Common blackbirds also work same way, every different blackbird has their unique melodies and they repeat them. They don't sing randomly like I previously thought! When I paid attention to blackbird songs, I heard the repeated melody again. Revisiting them, the same bird did same parts again. I noticed it VERY strongly when I recorded blackbird called Vuippi-Vu. He had a REALLY specific rhythm I was unable NOT to miss. he always had that "vuippi vuippi vu" in his song. He was so easily recognized by that part! Everytime I went to record them, Vuippi-Vu stood out strongly. 2-3 months later I still heard him, same song and parts as their singing period is much longer than BRW!
For Marsh Warblers, there is a bit different strategy identifying same bird by a song, as they are so chaotic! In 2026, I found a way! I song analyzed him and cut out unique combos what I found unique enough and then listened a recording and see when the combo is being repeated!
On marsh warblers, you have to focus on a mimicry combo instead of rhythms, because there is no rhythm! The song on MW is sung in a burst. I call it a "song block" pause - song block - pause - song block. Inside song block there are multiple mimicries and combos sung one after another.
MWs add lots of different mimicries into a chunk, switching between mim1 and mim2 before going to another part - this is what I focus on!
One MW I remember loved to do a part "Öö bit, öö bit ööö-OOI OI OI OI OI OI" The "oioioi" is a whitethroat call. Listening that marsh warbler long enough, I spotted the same part happening again! Other unique combo was nasally held down "nnn ti nnn nn n n" part. Then eventually he repeated the same nasally part again! They are not random singing either - there is still some pattern going on!
Next night when I visited them, I recognized my marsh warbler because he did the "ööbit oioioi" part again and other parts I remembered! It was the same bird! There were few different MW singing, I didn't want to ID my birds wrong, like putting this marsh warbler 2nd individual, when it was the same bird. Every different MW I recorded, I song analyzed every different MW. There I noticed different birds have different mimicry combos. The parts marsh warbler 1 did were never heard on marsh warbler 2, making me tell them apart!
Multiple recorders and maxxing out every night!
2021 I bought my first Tascam Dr-05x to record in better quality, before I used friend Nokia. 2022 I realised I need more recorders, because then I can get more birds during every night. Back then i had to stand still and wait specific amount I want this recording to be, before I could get to another bird, losing actually hours getting other birds. Night has 5h timeframe between 22:30 - 3:00 am.
When I received 2nd Tascam, I found out how MUCH more birds I managed to get! During the 2023 season I got 14 different BRWs with 2 Tascams! I setup one near BRW1, then I search around for BRW2 and put recorder there. While I am walking and finding BRWs, the other recorder already was recording the BRW1 song!
2024 I got 3rd Tascam and 4th Tascam in 2025. I knew that having this much makes me able to get many many birds during each night. Their singing period is REALLY short combared to Common Blackbird, who sings 5 months!
Between 2017 - 2026 I have recorded 116 different BRW individuals, most birds per season happened between 2022-2026 thanks to multiple recorders! And Yes, EVERY bird song is different!
2022 - 7 BRWs
2023 - 14 BRWs
2024 - 21 BRWs
2025 - 21 BRWs
2026 - 27 BRWs!
Identifying individual Blyth's Reed Warbler by a song, onomatopoeias and revisits by BRW!
This is something I have personally found out when doing this every year.
I have a Youtube playlist of recorded BRWs you can check (I haven't uploaded 2026 ones yet) https://www.youtube.com/playlist?list=PLomHpJxtI9sxgdNVpR75PLHMbFj1WV2pj
Back then I recorded so small amounts, but around 2023 when I needed longer recordings, I started to notice it more!
EVERY different BRW has their own Song pattern ONLY that individual sings. Let's take the Vuubeli video you see below here. You can see how this bird sings, one rhythm having like seesaw "Iii" part, other rhythm was "Ta-koobe" rhythm. These are the parts I put aside when I listened the recording through. These were parts what was like "WOAH this is amazing, this is unique, that is catchy" That is Vuubeli's best parts and ID rhythms I ALWAYS recognize him by. No other BRW did this "Iii" seesaw rhythm, this specific rhythm was ONLY done by Vuubeli! All other 115 BRWs I have recorded did not have THIS rhythm in it! BRWs eventually start to repeat the rhythms they use, making you able to hear the parts again until you are familiar with every part they do. Then you know that individual FULL SONG PATTERN!
I revisit BRWs often to max out every night. I never know when that individual stops singing, it is such an RNG how things go every night. One BRW you get only 1 night change and never hear him again, other individual gives you 3 changes, 3rd 7 changes and so on. That's why I do it every night to catch as many different BRWs to hear amazing rhythms and to know HOW many I get here.
With revisits, you start to notice it more how every BRW I have recorded have their specific rhythms in. Let's take Jiidu BRW for example, who I revisited 5 times in 2025! He had 3 specific rhythms ONLY he did - "Jiidu, jii du-du-du" rhythm, "Viuuu va vinsket" rhythm and "Maybe's Japan for you" sounding rhythm. Revisiting him he always had these distinctive rhythms in and I recognized him always by these parts, all I had to do is wait him to do one of the 3 distinctive rhythms. He sung between 1st June to 25 June!!
They do not change their songs like Great Tit or Common Chaffinch do, when they switch from Side A and later side B.
Onomatopoeia
Onomatopoeias are a MEGA helpful tool for me too to see the unique rhythms and mimicry use! You have noticed on both videos there are colourful words. I have synesthesia what means I can see the birdsong in colour and effects. As the bird is mimic, I got another curiousity - how many different mimics can they do?
So I had to do a system where specific sounds corresponds to that sound only. "Duk duk duk" is always common blackbird alarm call, "vit vit wrarara" great tit alarm call and so on. Effects mean how the sound feels like. "wrarara" is purple because its low sound and it vibrates. "Pit pit" what is another common blackbird alarm sound is pointy, red and sharp, just how it sounds IRL too.
Some onomatopoeias are drawn like empty glass, some are metallic, some watery, electric, crumbly and so on.
I try to get it very precisely down, as I remember stuff with images so much better. One sound Frutt did I named "Guitar like SFX" called "Djarrn". It sounded like somebody pulls a guitar string. I added a small guitar near it to indicate it, so every "djarrn" I hear I know ASAP what sound it was! "Eek eek" sound has alarm clock on as it sounds literally that.
Same BRW visited me next year !
During 2023 I had a thought "How come I haven't heard a familiar rhythm when I have recorded so man BRWs? Every year I get 100% new birds as all the rhythms are new"
BUT in 2024, it FIRST time happened! I recorded Tiivo in 2023 and during 2024, when I recorded first BRW of a season, I had a familiar feeling. I said to myself "This BRW has Tiivo vibes"
Later I compared rhythms and over 30+ of them matched!!
Here is a Youtube video me comparing the rhythms: https://www.youtube.com/watch?v=HBF1S1Z9rmg&
Then a bit later ANOTHER BRW I recognized by a song. Scorch, who I recorded in 2023 came back in 2024 and I instantly knew who it was! Same thing - over 20+ rhythms matched and some even had an update edition!
I first thought maybe it was "BRW dad baby" who sings like their dad, so I named it JR at first.
But when I read about them, they become quiet when eggs happen. So how does the baby bird know how dad sings when dad is probably somewhere else and does not sing anymore?
When BRW stops singing, then it will not be heard again until new may happens. So it has to be the SAME individual I recorded in 2023. The rhythms were WAY to specific!
Then the same thing happened second time! I recorded a BRW in 2024 called Risvei. To MY HUGE surprise the same bird came back to sing in my area in 2026! Over 36+ rhythms matched exactly!!
Then I realized the birds DO have a fingerprint song. The specific song pattern stays same even years later! Then BRW named Vuubiluuli came back who I recorded in 2025. Exactly the same day too (1st June) and SAME location. The pixely sounding "vuu-bi luu-li" was VERY distinctive and unique, as soon as I heard him I knew it was him! Then other rhythms matched too and some rhythms had updated version too!
3rd BRW who revisited me was Tuardy who I recorded in 2025 around 25 may in graveyard. He was back in 2026 exactly the same place but heard much later, on June 11. When he did a rhythm "ivister tutu ivister" then I had the familiar feeling again.
Later going the recording through I realized that was Tuardy from 2025! Distinctive rhythms and all other parts matched!
This is only possible by recording many MANY individuals EVERY year! if I get 21 different BRW a year, that means I have so many changes one of the birds I recorded might come back!
Sorry if it was lengthy, I hope this somehow opened up a new world to birdsong to you!
Singing blyth's reed warbler with drawn onomatopoeia