There are three types of teals found in North America. The Green-winged Teal and Blue-winged Teal are the most common and located over much of the continent. The Cinnamon Teal is found throughout the central USA as well as to the west coast and into Mexico.
These small waterfowl are known for their quick flight and aerial manoeuvre, where they are able to twist and veer in tight formation.
The teals mostly prefer shallow waters and mudflats, where they dabble for their food and sift through the sediment for forms of life. The male teals change from a dull non-breeding plumage to a bright and colourful plumage with many distinct markings while the females remain in plain-coloured plumage year-round. The Silver Teal is a southern vagrant that is sometimes seen in waterways and parks and is most probably an escaped species.
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.