Citations of this website or the 2013 paper can be found in:

Brecht KF, Müller J, Nieder A 2020. Carrion crows (Corvus corone corone) fail the mirror mark test yet again. Journal of Comparative Psychology. Advance online publication. doi.org/10.1037/com0000231 (full access restricted)

Callaghan CT 2017. ‘Shadow-boxing’ by A Northern Mockingbird (Mimus polyglottos). Florida Field Naturalist 45(1):21-23, 2017. Link

Callaghan CT, Martin JM, Kingsford RT, Brooks DM 2018. Unnatural history: is a paradigm shift of natural history in 21st century ornithology needed?. Ibis, 160: 475-480. doi:10.1111/ibi.12555

Cully S, Rebout N, Kemp L, Danel S 2026. Mirror, Mirror on the Wall: Preventing Shadow Boxing through Habituation – A Pilot Study. International Journal of Comparative Psychology 38.

Klem D Jr. 2025. Bird-window collisions: a critical review. The Wilson Journal of Ornithology, 1–31. https://doi.org/10.1080/15594491.2025.2542043

Menacho-Odio RM 2018. Colisión de aves con ventanas: problema, prevención, mitigación y tendencias de investigación. Zeledonia 22:1 59-76.

Netzley R, Partridge HC, Gagné SA 2024. Shadow-boxing: Major gaps to knock out in bird–window interaction research. Ornithological Applicatons 127:duae054.

O’Neill D 2017. Avian Shadow Boxing by Taiwan Scimitar-babblers. Bird Ecology Study Group Blog. Available from: http://www.besgroup.org/2017/08/31/avian-shadow-boxing-by-taiwan-scimitar-babblers (Accessed on 19/3/2018).

Sudhaus W 2019. Spiegelgefechte eines Haussperlings Passer domesticus im Vergleich mit anderen Vogelarten. Berliner ornithologischen Bericht 29: 46–57.

Verea C 2018. Some Venezuelan wild bird species that box against their own reflections. Revista Brasileira de Ornitologia 26(3): 192–195.

Verea C 2023. Shadow boxing: nine new records of Venezuelan wild birds’ species that fight their own reflections. Revista Venezolana de Ornitología 13: 51–55.