The BirdVoice Field Guide packs over 4 hours of bird sounds of 290 species into a laminated A4 sheet that easily folds to fit into a pocket. This storehouse of birding knowledge accessed with PENpal is invaluable when you are trying to identify a bird that you can hear but not see.
The species are sorted in scientific order and the Guide plays back European Expert Sound Recordist Jean Roche's Calls and Songs, as well as those of the British Library, the Great Bustard Group and Natural World UK. Just touch PENpal on the specie you want to hear and it will INSTANTLY play back the bird sound. If you want expert Geoff Sample's advice, then touch the "advice" cell next the specie. This advice is only available for some of the birds but remember you can now record your own observations next to any bird.
Bird sounds are instant, anywhere, no need for computers or wires.