As they mature slightly as in the first 4 images, they start in display sibling affections. I see this in raptors too, as they spend time to groom each other and see how each other is progressing. Before this, they rarely stay together on the same perch. In raptors, the older chick will groom the younger one, but in this case, both are reciprocating the affection. In one week, the chicks are always together. Deep in thick foliage to minimise attention. Their parents will perch very close to them, and when there is danger, the chicks remain motionless in the foliage while the adults will split in different directions, perch exposed to draw attention to themselves. However, the telltale sign is that they will only look in the direction of the chicks to check on their safety. (See main folder for adults)

I noticed as they grew older (2 weeks), they start to behave more like the adults, which get wary of threats and will shrink thin. This is an act of fear as they try to camoflage themselves to the surroundings. Even so, they will not fly as they cannot travel long distances like their parents. So the protection is still for the parents to draw predators away from the chicks.