I have the best website ever no viruses from is its called (thepiratebay.org) once you get there click on the games link and then type in Zoo Tycoon 2 bird of sanctuary fence!
They are exactly what they sound like a sanctuary for birds, where they are safe.
Clarkesdale Bird Sanctuary was created in 1975.
Khijadiya Bird Sanctuary was created in 1982.
Olsholmen Bird Sanctuary was created in 1973.
Sørkapp Bird Sanctuary was created in 1973.
Kongsfjorden Bird Sanctuary was created in 1973.
Taunggyi Bird Sanctuary was created in 1906.
Skorpa Bird Sanctuary was created in 1973.
Boheman Bird Sanctuary was created in 1973.
Guissezholmen Bird Sanctuary was created in 1973.
Isøyane Bird Sanctuary was created in 1973.
Nata Bird Sanctuary was created in 1993.