As a bit of hobby I wrote an online-map page that shows snapshots of data and can show the geographic distribution of a large number of birdspecies. It won't shatter the earth but here are some screenshots of things I saw.
|Somebody spotting birds and plant on a bike?|
|Cetti's zanger: a very specific habitat.|
|Great tit/Koolmees, very common but only 330+ sightings.|