I response to the previous post: Merlin is undoubtedly a wonderful resource which has opened up a whole new world for many people, especially, but not only, for those who love birds/wildlife but who are not birders. I use it sometimes to test it and to see if it picks anything up that I can't hear (now that my hearing is not as sharp as it used to be!)
But I would say that it is not 100% reliable especially when it comes to very similar sounding calls/songs. I have been watching a Dunnock singing in the garden and Merlin proclaimed it as Stonechat, and it has misidentified a call of a Jackdaw as a Chough. Living in Llawhaden would have been nice to have those on the garden list! It can also have a problem with Spotted Flycatcher calls. It doesn't always get it wrong but the calls of young Dunnock and Robin can fool it sometimes! It also identified the subsong of Blackcap as Garden warbler on one occasion.
On the whole it is amazing how much it can identify correctly and it is great to be able to see a sonogram in real time or as a recording. I think it just has to be used with caution particularly when it comes to scarce species unless they can also be confirmed visually.
An American Robin would be awesome but I suspect the settings may be need to be adjusted to amend the home location to Europe? Not sure what to make of the RL Partridge!