Why did Legolas set sail for the Grey Havens only after Aragorn's death?

[Galadriel55]

Originally Posted by Nolwë_Namiel

Sorry, Legolas was not one of the Eldar. The term Eldar is applied only to those elves who accepted the summons of the Valar and entered Aman, including Elwë Singollo.

But the term could also be applied to all Elves that went on the Great Journey, ncluding the Sindar.

Originally Posted by The Sil, Index

According to Elvish legend the name Eldar 'People of the Stars' was given to all Elves by the Vala Orome. It came however to be used to refer only to the Elves of the Three Kindreds (Vanyar, Noldor, Teleri) who set out on the great westward march from Cuivienen (whether or not they remained in Middle Earth), and to exclude the Avari.

Silvan Elves are said to be those Teleri that dropped out of the Great Journey to the East of the Blue Mountains (or was it Misty Mountains?). I guess some Avari could have come to the settlements later on.

So either way, Legolas is at least part Eldar.