Makohe can be read as ma-kohe, and it is interesting to find the example vave kai kohe in Churchill - in high summer the 'sky people' must be so high up as to be practically 'inacessible':

Kohe

A plant (genus Filicinea) that grows on the coast. Vanaga.

Vave kai kohe, inaccessible. Churchill.

*Kofe is the name for bamboo on most Polynesian islands, but today on Easter Island kohe is the name of a fern that grows near the beach. Barthel 2.

Vave means a billowing wave, such as warn us about a reef below the surface. To approach would surely mean the end of the canoe or raft - it would be 'eaten' (kai), a fate not far from that awaiting Spring Sun at midsummer.

The 'bamboo' could be an alias for the 'Tree'. Perhaps the Easter Islanders saw the 'bamboo' as a fitting image for the force steadily pushing the sky roof during spring. One pice after another was added to the stem, but at Hatinga Te Kohe the great 'Tree' broke.

It is noteworthy that the ancient Irish system of writing was based on the names of different trees. Possibly the constellation kiore - henua, used is serial in a few rongorongo texts, illustrate the sections of the 'bambo' gradually added, as for example in Mamari:

Ca1-18 Ca1-25 Ca2-23
Ca3-1 Ca3-4 Ca3-8 Ca3-13
Ca3-16 Ca3-20 *Ca14-17 Cb2-7
Cb2-16 Cb2-22 Cb3-2 Cb3-6 Cb3-12 Cb3-15
Cb3-20 Cb4-2 Cb4-7 Cb4-12 Cb4-16 Cb14-11

Makohe could, maybe, alternatively be read as mako-he (or as ma-ko-he), where he might serve as a sign identifying the time when Sun no longer is present (cfr Tama he ika kino he ihu roroa).

It is furthermore possible that ke in kena connects the booby with the redtailed tavake:

kukuru toua white pigeon makohe frigate kena booby tavake redtailed tropic bird
ascending   descending
ka araara sooty tern ruru black petrel
te verovero taiko
kava eoeo sooty tern kumara white tern
pi riuriu kiakia
manu tara erua 2 sooty terns tavi small lead-coloured tern tuao dark brown tern tuvi gray tern

Tava in tavake also seems to allude to tuvi and tavi. In the beginning there is a single bird and then comes a pair. Tavake in the corner of the 'dolmen' seems to announce the beginning of fall, and the pair of small greyish terns could be meant to indicate the end of fall.

Kukuru toua marks the corner where spring turns into summer and tavake the corner where summer turns into autumn. I guess the corners should be inhabited by Moon (always changing) rather than by Sun (never changing). On Tahiti a pigeon was called rupe, a name containing the Moon vowel u. At toki we saw how a multiple occurrence of u probably indicates a solstice:

...Pewa-o-Tautoru, Bird-snare-of-Tautoru; the constellation Orion in New Zealand. The Belt and Sword form the perch, te mutu or te teke, while Rigel is the blossom cluster, Puanga, used to entice the unsuspecting bird ...

Belt and Sword will form the T.

Te mutu is the 'perch' and so is te teke. The last night of the month was Mutu (according to Métraux), and teke presumably corresponds to the last day of Spring Sun. Te-ka has lost its 'fire' and then becomes te-ke. Next stage comes with adding u to indicate the time of Moon: tekau.