Hoverfly Horde: The Spectacular Migration of Marmalade Hoverflies in the Pyrenees!
Bielsa, Spain – Every fall, an astounding migration occurs in the Pyrenees, a mountain range that straddles the border between France and Spain. Thousands of marmalade hoverflies, adorned with citrus-colored bodies and black stripes, swarm through the picturesque Bujaruelo Pass. The insects, along with white and yellow butterflies, brave harsh winds as they journey south for the winter. This mesmerizing spectacle, first documented in 1950, continues to captivate researchers like Will Hawkes from the Swiss …