Nest‐site and breeding success of the wrentroglodytes troglodytesinside human habitations

Nest sites and nesting success of the Wren in farms of NE Spain were examined. Nests were found: inside human habitations in abandoned platforms of Swallows (41%); in bundles of rope, cloth or other soft materials (31%); and in cavities (28%). Nests occupied and not occupied by females did not differ significantly in relation to nest sites. The nesting success of 42 occupied nests was 93% with no predation. Some of the factors which may induce Wrens to seek the vicinity of man are discussed.