What kinds of advantageous traits most likely help this bird to fly and reach food?

Assume this bird is part of a migratory flock. How would flocking behavior help its species to survive?
Assume that most birds have solid bones, but that some have bones like the one in the diagram. How would this type of bone be advantageous? What might be the outcome of an advantageous trait like near-hollow bones?

Advantageous traits that help birds to fly and reach food include large and powerful wings, strong muscles, a streamlined body shape, and keen eyesight. These traits enable the bird to efficiently navigate and maneuver through the air in search of food.

Flocking behavior in migratory birds provides several benefits for the species' survival. It allows for increased protection from predators, improved foraging efficiency, and enhanced communication within the group. Additionally, flocking behavior enables the birds to share information about food sources and navigate long distances more effectively.

Birds with near-hollow bones, like those in the diagram, would have a lighter overall body weight, making it easier for them to take off and stay airborne for longer periods of time. The hollow bones also provide greater structural strength and flexibility, allowing for efficient flight maneuvers.

The outcome of having near-hollow bones as an advantageous trait would be increased agility, speed, and energy efficiency during flight. This would give the bird a competitive advantage when it comes to hunting for food, avoiding predators, and navigating through various environments.