M. Njegovan et al., A MOTOR-DRIVEN FEEDER FOR OPERANT TRAINING IN SONG BIRDS, Behavior research methods, instruments, & computers, 26(1), 1994, pp. 26-27
Conventional pigeon feeders can make noise, spill food, and injure bir
ds in applications using small song birds as subjects. We developed a
motor-driven feeder based on the principle of the piston to address th
ese concerns.