Data from: Balancing conflict and coexistence: Interactions between invasive monk parakeets and native urban birds

Description: This dataset provides the underlying data and analytical code (R scripts) for the manuscript "Balancing conflict and coexistence: Interactions between invasive monk parakeets and native urban birds" (accepted for publication in Ecological Applications).

Purpose: The primary objective of this dataset is to evaluate the complex ecological interactions—spanning both conflict and facilitation—between the invasive Monk Parakeet (Myiopsitta monachus) and several native urban bird species to better understand the impacts of biological invasions in urban ecosystems.

Nature: The dataset consists of a combination of experimental and observational field data, alongside the custom R scripts used for generalized linear mixed modeling (GLMM) and data visualization. The files are organized into three self-contained modules containing raw counts, standardized abundance metrics, and behavioral interaction matrices (.csv format), accompanied by reproducible analysis code (.R format) and detailed metadata (.txt format).

Scope: The data was collected across multiple urban parks in Madrid (Spain) between 2021 and 2023. Taxonomically, it captures interactions involving key native species such as the House Sparrow (Passer domesticus), Eurasian Tree Sparrow (Passer montanus), Rock Pigeon (Columba livia), Stock Dove (Columba oenas), Eurasian Magpie (Pica pica), and Eurasian Blackbird (Turdus merula). The dataset comprehensively covers three main ecological axes: 1) interference competition at experimental foraging sites (quantifying agonistic and intimidation events), 2) spatial avoidance (measuring native bird Kilometric Abundance Index along a parakeet density gradient), and 3) nesting facilitation (recording the breeding use of parakeet nest structures by native species).