Structural simplification compromises the potential of common insectivorous bats to provide biocontrol services against the major olive pest Prays oleae

•Crop production intensification entails the structural simplification of olive groves.•Structural simplification impacts the activity levels of bats but not those of the olive pest Prays oleae.•Bat-mediated biocontrol services within olive groves can be compromised with decreasing structural complexity.•Agri-environmental schemes targeted at this culture should consider these deleterious impacts.