Gayk ZG, Simpson RK, Mennill DJ. The evolution of wood warbler flight calls: Species with similar migrations produce acoustically similar calls.  2021. Available at: https://onlinelibrary.wiley.com/doi/10.1111/evo.14167.

Hutto RL, Hutto RR. Does the presence of an observer affect a bird's occurrence rate or singing rate during a point count?.  2020. Available at: http://doi.wiley.com/10.1111/jofo.12329.

Proppe DS, Finch E. Vocalizing during gaps in anthropogenic noise is an uncommon trait for enhancing communication in songbirds. Journal of Ecoacoustics. 2017;1:TLP16D.