Thanks for your replies guys. I'm fairly confident it was any of the birds suggested. It was a sound I've never ever heard before. Kicking myself now for not stopping and having a look, but i was running with a friend at the time so couldn't really. Cheers scott.

That's depending on the circumstances and conditions at the time. Another pointer is If it was through the trees, this can distort slightly any sounds travelling through the woodland. However, most Birds by September are largely silent since the breeding season has ended and very few birds will be in any kind of song and instead will more likely give some kind of call. Most Birds will also be going through a molt as well and do not want to bring any unnecessary attention to themselves due to the need to conserve energy as much as possible during this time. It is possible that juveniles (especially blackbirds) might have given short bursts of "sub-song" that will sound somewhat alien from what we're used to and this would be my personal best guess (based on the time of year especially). Hope this helps!

I don't suppose it could've been the Green Woodpecker could it?

Ideas:
- escaped cagebird
- Bullfinch subsong (fairly quiet)
- Robin (they can do some weird stuff)
- Mistle Thrush

This is a bit of a strange one. A couple of weeks ago I was running around Byrom Wood and I heard the strangest bird call/sound. It almost sounded flutey like. Almost like a Golden Oriole, but it was a lot quicker and didn't last very long. It was like a flutey trill. Honestly I don't think I've heard anything like it. I've just watched a Golden Oriole video on Facebook and it's just reminded me off it. Anybody any ideas September 13th was the date just checked strava if there was anything unusual about that day.

-- Edited by Scott robinson on Thursday 4th of October 2018 07:09:05 PM