Foreign Exchange: Mexico's butterfly reserve alights in the soul
They first catch the eye as tiny, ghost-like flashes. It takes a moment to fix the flitting shapes, reports Ken Ellingwood.
You have come to these highland woods to see a natural marvel. The sparse, darting forms are not quite that. But they silently summon you deeper with the suggestion that this is just the start.
They are butterflies, and for a few months a year they convert the hills here into a wonderland of fluttering movement and color.
-- Deborah Bonello in Mexico City for La Plaza