1. The head is hanging for the bird and his beak is very long, the image is expressing exhaustion.

Such a state is not necessarily connected with old age. It can also happen at the completion of hard work:

... In the beginning there was nothing but the sea, and above soared the Old-Spider. One day the Old-Spider found a giant clam, took it up, and tried to find if this object had any opening, but could find none. She tapped on it, and as it sounded hollow, she decided it was empty.

By repeating a charm, she opened the two shells and slipped inside. She could see nothing, because the sun and the moon did not then exist; and then, she could not stand up because there was not enough room in the shellfish. Constantly hunting about she at last found a snail. To endow it with power she placed it under her arm, lay down and slept for three days. Then she let it free, and still hunting about she found another snail bigger than the first one, and treated it in the same way. Then she said to the first snail: 'Can you open this room a little, so that we can sit down?' The snail said it could, and opened the shell a little. Old-Spider then took the snail, placed it in the west of the shell, and made it into the moon. Then there was a little light, which allowed Old-Spider to see a big worm.

At her request he opened the shell a little wider, and from the body of the worm flowed a salted sweat which collected in the lower half-shell and became the sea. Then he raised the upper half-shell very high, and it became the sky. Rigi, the worm, exhausted by this great effort, then died ...

The end of the journey is, it seems, possible to describe by other rongorongo glyphs, e.g.:

henua ora	haú	pau