Lunar eclipse and climate impact on butterfly coloration

A near-total lunar eclipse is expected to occur during the night of August 27 and the early morning of August 28, 2026. During this event, Earth's shadow will cover approximately 96% of the Moon's surface, causing it to take on a deep red hue due to the refraction of sunlight through Earth's atmosphere. An estimated 3.3 billion people across North America, South America, parts of Europe, and Africa will have the opportunity to observe the phenomenon.

Separately, scientific research published in PNAS Nexus indicates that rising global temperatures are affecting the physical appearance of Morpho butterflies. A study led by Juliette Rubin of the Smithsonian Tropical Research Institute found that extreme heat alters the nano-scale structures on the wings of Morpho helenor subspecies in Panama and Ecuador. These structural changes result in wings that are significantly less bright and more faded compared to those raised in standard tropical temperatures, potentially impacting how they are perceived by predators and mates.