Figure 1.

The examples of the object memory test. (A) During the imprinting phase from 1 to 7 day, a white block was placed inside each pen; and (B) during the test phase at 15 day, the tested bird was placed at the middle of the runaway board with the randomly placed imprinted object (white block) and a novel object (blue block) at one of its ends (16 birds per treatment).