EcologybioRxivPreprint
Tracking trends in monarch abundances over the 20th century is currently impossible using museum records: a response to Boyle et al. (2019)
Leslie Ries, Elise F. Zipkin, Rob P. Guralnick
The paper critiques Boyle et al.'s analysis of monarch abundance trends, showing their results are invalid due to uncorrected sampling biases and highlights the need for better data to track trends over the 20th century.
DOI 10.1101/581801