Training Roller canaries-FI

Bird’s eye view: the Roller canary (Cage & Aviary Birds 02.03.16)

In 1921 Hans Duncker was taking a walk and heard a nightingale sing.  Two things struck him as extraordinary: firstly it was August, long past the season when nightingales sang; secondly he was in the middle of Bremen, his home town.  The explanation, when he discovered it, was even more extraordinary. ... Read More