8-13-18 Messenger App Update: Pigeons?
Linklets:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1334394/
https://www.ncbi.nlm.nih.gov/pubmed/10909135
https://www.urmc.rochester.edu/people/26563374-wilfred-r-pigeon
https://www.ncbi.nlm.nih.gov/pubmed/20438325
https://www.ncbi.nlm.nih.gov/pubmed/19488733
https://en.wikipedia.org/wiki/Homing_pigeon
http://www.pigeonrescue.org/wp-content/uploads/2016/06/Pigeon-Appreciation-Day-by-Leda-Chung-Hosier-2016-1024x933.jpg