Forty-four adult, wild-caught feral pigeons were obtained
from a commercial dealer (Stephen Wright, Richmond Hill,
Ontario). Two birds were randomly chosen to be shaped as
demonstrators for the social learning test and remained in
the laboratory for the whole 6-month period. The remaining
42 birds (in three groups of 12 and one group of six) were
subjected to a series of tests over a period of 4 weeks each
in 2001.