Hummingbird Landing on its Nest

The mother hummer finally came back to its nest after a short while of looking for something to eat (well in her case, it's 'sipping' the nectars). Actually the bird leaves the nest only when she's starving. Or when it gets disturbed by surroundings' activity, like going in and out of the house, opening and closing of the door. She's not accustomed to us just yet. She just mainly observe its environment. The mother hummingbird sits on its eggs calmly and patiently.