oa Civil Engineering = Siviele Ingenieurswese - Nest building - the engineering way? : more engineering
Rock martins (Hirundo fuligula) are regular summer-breeding visitors to the Braamfontein campus of the University of the Witwatersrand (Wits). The diversity of architectural styles of buildings on the campus offers a range of suitable sites for the nesting needs of birds like the rock martins. The nest is constructed of sand/clay pellets, used as a form of adobe, stuck together to form a 'half-cup' with sides adhering to a vertical wall or rock face. A number of the building façades provide the overhang structure necessary to protect against rain and nest predators.
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