Here are a few simple questions to ask that will help you identify a bird's nest based on where you are and what it looks like.
Nest Identification - Identify this - Wildlife - The RSPB Community
Empty Nesters: Bird Nests in the Arb – Cowling Arboretum – Carleton College
8 Natural Bird Eggs That Are More Spectacular Than Dyed
All about the spring nesting cycle –
NestWatch Identifying Nests and Eggs - NestWatch
8 Natural Bird Eggs That Are More Spectacular Than Dyed
How To Identify Bird Nests - Urban Hawks
Spot the Difference: A Guide to Identifying Bird Eggs
8 different types of birds' nests – Learn the Birds
British Bird Egg Identification Chart - The Bird House