Answer: Yes, it is. Ethological displacement is a behavior or pattern in animals, where they are conflicted due to some unusual event and hesitate to make movements to touch or do what they want to do. The grey-leg goose mother did not expect the eff to roll out, so she gently pushes it back.
Explanation: Displacement activity is a behavior where animals face a situation that can be stressful or unpleasant for them, very commonly an event that is out of their routine. Animals hesitate on doing an action and make movements such as scratching, feeding, or preening. In this case, the grey-leg goose mother made a quick, but soft movement to put back the unexpectedly fallen egg.