This set of four stamps was issued in 2005. The first one depicts a group of
horned larks (Eremophila alpestris), which were discussed in a previous post. The second stamp shows a pair of piping plovers (Charadrius melodus). This small shorebird can be found in areas of North America, more specifically on the Atlantic coast and on the Great Lakes shores. It is near threatened. It has two subspecies. It feeds on insects, crustaceans and marine worms.
The third stamp presents a pair of stilt sandpipers (Calidris himantopus), another small shorebird that it is near threatened. It can be found in North, Central and South America as it is migratory. It eats insects and other invertebrates such as molluscs as well as seeds, leaves and roots of aquatic plants.
The final stamp depicts a pair of willow ptarmigans (Lagopus lagopus), which have been presented in the past.
The depictions on all four stamps are based on drawings by the French-American artist, naturalist and ornithologist John James Audubon (1785-1851).