A small but vocal group of Hawaiians and environmentalists have long viewed their presence as disrespect for sacred land and a painful reminder of the occupation of what was once a sovereign nation.
On the first day of the exhibition, all the "notables" were at the reception party. He was instead staying far away, sitting on a stone, chatting to a nervous local child.
It was the worst attack so far on the peaceful demonstrators in Taiz, a poor city four hours south of the capital, Sana'a, where there have been many protests since unrest broke out earlier this year.
Landfill sites on the Iberian peninsula have long attracted local white storks, but all of the Spanish birds tagged in the study flew across the Sahara desert to the western Sahel.