Sempach Bird Observatory was created in 1924.
Broome Bird Observatory was created in 1988.
Rossitten Bird Observatory was created in 1901.
Eyre Bird Observatory was created in 1977.
Jerusalem Bird Observatory was created in 1994.
Heligoland Bird Observatory was created in 1910.
Whitefish Point Bird Observatory was created in 1978.
Barren Grounds Bird Observatory was created in 1982.
Rotamah Island Bird Observatory was created in 1979.
Great Basin Bird Observatory was created in 1997.
Prince Edward Point Bird Observatory was created in 1995.
The population of Sempach is 1,102.
Rossitten Bird Observatory ended in 1946.