authorea

Authorea

10.22541/au.158618504.41675007

Presence-only data are currently insufficient for broad-scale phenological analyses for most species of temperate butterflies

Larsen

Elise

Georgetown University

Shirey

Vaughn

Georgetown University

6 4 2020

This preprint is available at https://doi.org/10.22541/au.158618504.41675007

Large occurrence datasets provide a sizable resource for ecological analyses, but have substantial limitations. Phenological analyses in Fric et al. (2020) are flawed due to insufficient data and improper analysis. Our reanalysis of 22 univoltine species with sufficient data (from 100 original species) found substantive differences in macroscale phenological patterns.

bias butterfly flight period gbif latitude lepidoptera phenology presence-only spatiotemporal bias