I have been struggling in identifying gulls, terns and other shore birds and also was wanting of more detailed information. We were searching the Center's large book collection for just the right book and Pete came over to welcome us and help us out.
He recommended these two outstanding birding books:
This book provides several amazing colored pictures for each bird in various stages of maturation in its habitat and identifies birds using size, structure and color patterns. It also provides the detailed information I was looking for regarding migration and behavior and more.
The second book is The Sibley Guide to Birds and it is fantastic.
I like how this book is organized, as it provides for each bird, a juvenile, an adult non-breeding and then an adult breeding colored drawing, including dates of when to expect this plumage coloration.
It also includes descriptions, marking highlights, sizing, maps, call information, and has an excellent summary sheet for each Family.