My recommendations are similar to Jeremy’s, except that I prefer the Sibley app. I use the Sibley Guide app often. It has looping sound tracts. It also has a variety of calls for each species. I no longer carry a bulky field guide into the field.
If it is just sound you want, the tracts from the computer program, Thayer’s Birds of North America. It is great but expensive. The apps can be downloaded to your phone once you buy the program. Not as much variety within species, but the mp3 files seem to stop less often than those in the Sibley app. iBird Pro is good too, but I don’t use it much. BirdsEye is essential if you use eBird; and, of course, BirdLog if you are contributing to eBird. Hope this helps. By the way, my blog this morning shows a series of photos of a Vesper Sparrow water-bathing. (Apparently they usually dust-bathe.) http://dantallmansbirdblog.blogspot.com dan -- Dan or Erika Tallman Northfield, Minnesota daner...@gmail.com http://dantallmansbirdblog.blogspot.com ".... the best shod travel with wet feet...Beware of all enterprises that require new clothes ....”—H. D. Thoreau ---- Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net Archives: http://lists.umn.edu/archives/mou-net.html