"Get instructions for collecting a sample of critters from your stream. (The critters included are for the Mid-Atlantic region of the United States.*) Identify the critters, using a user-friendly key complete with photos and identifying characteristics. See an estimate of your stream's health, based on the critters you've found. Upload your results to the Audubon Naturalist Society interactive map, on which you can see the results found by other users and the reports of trained macroinvertebrate specialists. See how our region's stream health has changed over the years."
"What's that bird? Merlin Bird ID helps you solve the mystery in 5 questions, or with a photo of a bird. First, Merlin asks you a few simple questions. Then, almost like magic, it reveals the list of birds that best match your description. Pick your bird, then delve into more photos, sounds, and ID tips about your bird! If you have a photo, Merlin can help there as well. Take a photo, or choose one from your photo gallery, and Merlin will offer a list of birds that best match your photo."
"The iNaturalist Android app helps you upload citizen science observations of plants and animals to the iNaturalist.org online community for naturalists as well as other members of the iNaturalist network such as NaturaLista.mx in Mexico."
"Virginia Tech Tree Identification brings the award winning Virginia Tech digital dendrology material to your Android smart phone. It contains fact sheets for 969 woody plants from all over North America with an in depth description, range map and thousands of color images of leaves, flowers, fruit, twigs, bark and form. Users can narrow the species list for any location in North America using the phone's GPS, network signal or any entered address or zip code."