There are at least fifty types of shorebird species in North America, not including vagrants. Vagrants are birds that were blown off course during high winds or storms and others that just happen to drop in for a short visit. These birds vary in size, ranging from the small 6" Least Sandpiper to the 24" Long-billed Curlew, which is the largest species in the shorebird families.
These birds are found throughout North America and most of them can be seen along the water's edge of our lands. Some prefer salt water and can only be seen on the sandy and rocky coastlines of the oceans and mudflats, while others may be found feeding in salt water and fresh water, depending on the season. Still, others may only be found in pastures, such as the Upland Sandpiper.
Shorebirds are among the most difficult birds to identify. Some species are quite similar to each other and their calls are the only true way to distinguish one from the other. Most of these birds will change from a colourful plumage in their breeding season to dull greys and browns in the fall and winter months.
Avibase - the world bird database This site provides the user with a complete list of bird species, broken down per country, or in the example of the US or Canada, per state and province. Here, bird species names are available in other languages, a great asset to be used as a translation of foreign bird names.
ABA - American Birding Association This site represents an organization that maintains official records of all birds species that have been proven to have been seen inside the perimeters of the North American Continent and the surrounding bodies of water. Regular revised versions are posted to keep the bird list current at all times. This is the list used by all serious birders over their lifetime. You may be aware of the movie called the "Big Year". It was with this list that all the competing birders used in an attempt to set a new record as to how many bird species that could be seen by an individual birder in one calendar year.
I hope you will take advantage of these suggested websites. I have used each of them, in one way or another, throughout the years in my quest to better identify and understand our fine feathered friends.