Data from: Wetter and more forested nonbreeding areas result in later departures but a faster spring migration in Vermivora chrysoptera (Golden-winged Warblers)

Declines in migratory landbird populations require targeted research to
identify population-limiting factors acting throughout the annual cycle.
Tracking studies provide data on migration timing and speed, which have
been used to describe carryover effects of nonbreeding habitat use. To
explore how variation in precipitation and forest cover among nonbreeding
sites influenced departure dates and migration speed in Vermivora
chrysoptera (Golden-winged Warbler), we fitted 69 birds with radio
transmitters in Costa Rica and tracked them via the Motus Wildlife
Tracking System. Capture sites covered a broad gradient of precipitation
and forest cover and were separated by <100 km. The datasets
contained herein include departure dates and migration durations for birds
tracked via Motus and related data for each individual, including capture
location, age, sex, and Motus tag ID. For each capture location in Costa
Rica, we extracted precipitation values from Worldclim and estimated
forest cover around locations in QGIS (see methods below).