Wednesday's birding column (Nov. 5) in the StarTribune Variety section discussed a number of birding apps for cell phones and pads. Here is a more complete list. For each of these, at app store, read the fine print and the reviews if there are any. Also good idea to read the column in Wednesday's paper.
Purchase hints — The word GET shown with app on Apple store listing means you must purchase add-ons to have the app you might expect to get in the first place.
Check app description for country or world region, sometimes not obvious.
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Raptors ID, nice intro video, explanatory text, 34 species, covers MN, each species overview, 5 images, helpful video about 70 second each, range, vocals. Videos best feature here.
Audubon Owls, photos, maps, text, all MN species, 18 North America (NA) total, poor video, good still shots, good vocal, inclusive text, bird parts explained, issued by Hawk Watch International and Cornell.
Bird Calls, covers the world, banner ads, must buy to use "all features" $6.99 or monthly subscription.
iBird Pro, extensive text, six photos per species. Can purchase long list of specialized add-ons, but not necessary to use app. Publisher Mitch Waite Group, full credits given. Support available. Settings for language, day or night, and control of ads, links to other info sights, published in 2008, and updated as recently as last month (Nov 2018).