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Monarch butterfly: Facts about the iconic migratory insects Erin Banks Rusby
With their bright orange hues and lengthy migration, monarch butterflies (
Danaus plexippus) are one of the world s most iconic insects. But their population has steadily dropped in recent decades as they face habitat loss and other threats.
Monarch butterfly life cycle
Monarchs go through four life stages: egg, larva, pupa and adult.
They can mate several times, sometimes for 16 hours at a time, after which the female immediately starts laying eggs on milkweed plants, according to Monarch Joint Venture (MJV), a non-profit partnership of organizations that facilitate monarch conservation. Monarch eggs are about the size of a pinhead and are football shaped, with vertical ridges, said Laura Lukens, the national monitoring coordinator for. The eggs are off-white to yellow in color.
Monarch butterfly: Facts about the iconic migratory insects
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Credit: Syracuse University
Professors in Syracuse University s College of Arts and Sciences explored whether or not the scientific community will ever be able to settle on a total number of species of living vertebrates, which could help with species preservation. By knowing what s out there, researchers argue that they can prioritize places and groups on which to concentrate conservation efforts.
Research professor Bruce Wilkinson and professor Linda Ivany, both from the Department of Earth and Environmental Sciences, recently co-authored a paper in the
Biological Journal of the Linnean Society where they determined that forecasting the total number of species may never be possible.