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This suggests that butterflies migrating along the eastern seaboard are migrating to locations other than Mexico, or they have a higher rate of mortality than those migrating inland. [20] Monarch butterflies are thought to respond to different cues that promote the fall season southern migration.
The eggs weigh less than 0.5 mg (0.0077 gr) each and have raised ridges that form longitudinally from the point to apex to the base. Although each egg is 1 ⁄ 1000 the mass of the female, she may lay up to her own mass in eggs. Females lay smaller eggs as they age. Larger females lay larger eggs. [30]
The butterflies lay their eggs on the milkweed, and when caterpillars hatch, they feast on the plant’s leaves. There are more than 20 species of milkweed native to Florida, less than half of ...
These butterflies migrate in the fall, This fascinating insect goes through an amazing life cycle consisting of four stages: egg, larvae, pupa, and adult. Some monarch butterflies migrate each ...
As displayed in an illustration by the U.S. Geological Survey, in wetter conditions, butterflies lay fewer eggs, while warmer temperatures hinder the growth of milkweed is hindered by warmer ...
There are several historic records about migrating butterflies. There are records dating back to 1100 about migrating butterflies (probably a Pieris species) from Bavaria to the Duchy of Saxony and from 1248 about the migration of yellow butterflies in Japan. When flying at high altitudes, spotting migrating butterflies or moths can be hard.
Threats to the monarchs include the loss and degradation of habitat used for breeding, migration and overwintering, including milkweed plants they rely on as a place to lay their eggs.
Monarch Watch is a volunteer-based citizen science organization that tracks the fall migration of the monarch butterfly. [1] It is self-described as "a nonprofit education, conservation, and research program based at the University of Kansas that focuses on the monarch butterfly, its habitat, and its spectacular fall migration ."