In my city park there are mostly two types of bird:
- Mallard ducks
- Rock doves (pigeons)
When I feed pigeons, they approach me very closely. Sometimes they peck the food that fell on my feet. If I hold my hand with food in the air some pigeons will land on my hand and eat.
In the same park there are Mallards, who are always very cautious and they try to maintain about 1-1.5 meters distance from me. They also run away when they see some rapid movement of mine.
Why are ducks more cautious? Why are pigeons more careless?