Urban Nesting Adaptability of Psenulus fuscipennis (Hymenoptera: Crabronidae): First Record from Istanbul (Türkiye) and Insights from GLM-Based Abundance Modeling
Journal: Journal of the Entomological Research Society
Year: 2026

The fragmentation of urban green spaces in megacities such as Istanbul has raised concerns about the biodiversity of insects, particularly solitary hymenopterans. This study reports the first occurrence of Psenulus fuscipennis (Dahlbom, 1843) in Istanbul, Türkiye, and evaluates its nesting behaviour across an urbanisation gradient using artificial nest blocks. Twenty-five nest blocks, with entrance cavity diameters of 1.0, 0.7, and 0.4 cm, were monitored from March to September 2020. Nesting occ