Un excellent commentaire ci-dessous suggère que les oiseaux ayant, contrairement à nous, la capacité de voir en quadrichromie, le maquillage de ces dames leur apparaitrait particulièrement perturbant sous le spectre UV.
"A European study found urban birds flew away sooner when approached by women than men. Men got about 1 metre closer on average before the birds scarpered. It held across 37 species and five countries.
Scientists don’t know why. They controlled for height, clothing color, direct gaze, and long hair being visible.."