См.: https://www.rothschildarchive.org/contact/faqs/rothschilds_and_ pigeon_post.

Biro, D., Freeman, R., Meade, J., Roberts, S., & Guilford, T. (2007). ‘Pigeons combine compass and landmark guidance in familiar route navigation’, Proceedings of the National Academy of Sciences, 104 (18). P. 7471–7476.