Great app, by Color combinations and feeding location it offers possible species. Has helped me identify for example that the female finch is a dull yellow and olive in the summer while her mate is bright yellow and black. I thought it was 2 different types of finch. A fun thing to do is use the different bird calls contained in the software. In the evening the birds will come to our location. (Tricking them yes but fun)
Tony luciani about Merlin Bird ID by Cornell Lab, v1.0.4