Here is a great tool to help identify birds. Using this app on my phone and a pair of binoculars, I have identified all the birds where I shoot. Was very helpful in figuring out what bird is calling and identifying. HOSPs, cowbirds, grackles and starlings are always DRT. And those damn red squirrels.
merlin.allaboutbirds.org
Edit: The app has a tool called "Sound Id", that's the most helpful part.

Merlin Bird ID - Home
Bird ID Wizard—Step-by-step Answer three simple questions about a bird you are trying to identify and Merlin will give you a list of possible matches. Merlin offers quick identification help for all levels of bird watchers and outdoor enthusiasts to help you learn about the birds in any country i
Edit: The app has a tool called "Sound Id", that's the most helpful part.