In the clear: Weather drives the northward movement of American Tree Sparrows (Spizelloides arborea) as spring progresses

The American Tree Sparrow (Spizelloides arborea) is a sub-Arctic breeding species that spends the nonbreeding season in temperate regions of North America, and is a high-priority candidate for conservation status assessment. To provide new information about their movement ecology and migratory connectivity, we used automated radiotelemetry to track their movements and stable-isotope analysis of feathers to infer breeding or natal origin. The work is published in the Journal of Field Ornithology. In this repository, we include several datasets that support the work and an R script showing the geographical assignment procedure., , # In the clear: Weather drives the northward movement of American Tree Sparrows (*Spizelloides arborea*) as spring progresses

Dataset DOI: [10.5061/dryad.cc2fqz6hk](10.5061/dryad.cc2fqz6hk)

## Description of the data and file structure

We used Motus automated radiotelemetry to track the movements of American Tree Sparrows and stable-isotope analysis of feathers to infer their breeding or natal origin. This repository contains the data used to support the publication in the Journal of Field Ornithology and an R script to show the geographical assignment procedure.

### Files and variables

#### File: ATSPassigment.R

**Description:** R script code to assign geographical origin to American Tree Sparrows based on their feather deuterium value

#### File: ATSPdeparture.rds

**Description:** departure time from capture locations; *.rds can be read by readRDS in R

##### Variables

* motusTagID: unique identifier for the Motus radiotransmitter
* year: year of the study (YYYY)
* Location: c...,