Data and code from: Nocturnal flight call monitoring reveals in-flight behavioral alteration by avian migrants in response to artificial light at night

The world in which birds evolved to migrate has been drastically altered in the Anthropocene by artificial light. Sources of light such as urban centers or bright upward-facing lights attract migrants, altering their behavior, especially during inclement weather, often leading to mortality. Seemingly less extreme sources, such as pole-mounted floodlighting ubiquitous throughout much of the world, have received comparatively less study, and migrant responses to such sources are poorly understood. We studied migrant behavior in relation to light at White Sands Missile Range (New Mexico, USA) by recording nocturnal flight calls at sites with and without lights during non-inclement weather. We collected 103,424 h of recordings and detected 2,851,863 calls over three fall migration seasons. We assessed how temporal, weather, and lighting variables explain variability in call rates between light and dark sites, and examined how different taxonomic groups behave in relation to light. Contrary ..., , **Dryad dataset**

Dataset DOI: [10.5061/dryad.w6m905r26](10.5061/dryad.w6m905r26)

**Description of the data and file structure**

The data and code included herein was used to assess in-flight avian behavioral responses to artificial light at night and included analyses of behavioral responses under a variety of weather, temporal, and lighting based variables, and taxonomic specific analyses of responses to light.

**Files and variables**

**File: Code_for_Osterhaus_et_al._(2025)_Biological_Conservation.Rmd**

**Description:** Code written in R Markdown that is used to access data included in this dataset and recreate the analyses associated with the related manuscript

**File: AllDurations2021.csv / AllDurations2022.csv / File: AllDurations2023.csv**

**Description:** Duration information for each of the acoustic recordings for 2021, 2022, 2023.

**Variables**

* filename: name associated with the specific recording file
* Duration: duration of the specific recording (in seconds)

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