After that, on Quirks and Quarks, they were interviewing a woman who was exploring the relationship between the coloration of male barn swallows, and their testosterone levels -- the darker they are, the more testosterone, but they weren't sure which was cause and which effect. So they captured, tagged, and coloured male barn swallows, and released them back into the wild.
The high-tech technology they used to change their colour? Non-toxic black markers.
I want that on my résumé: "2008: coloured live barn swallows with black magic marker for science."
Naturally, when I went into Tim Horton's right after hearing this interview, the radio was playing "Ça fait rire les oiseaux."
Context is flipping you the bird. QWP.