It could be a combination of both factors. Large birds may be harder for predators to attack due to their size and strength, making them more difficult to capture and subdue. Additionally, larger birds may be more intimidating to predators, causing them to think twice before attempting an attack. On the other hand, larger birds may also be harder for predators to see, especially if they have protective coloration or patterns that help them blend into their environment. This can make it more challenging for predators to locate and target large birds as prey. Overall, it is likely a combination of both factors that contribute to the higher survival rate of large birds.
