Migratory Butterflies
نویسندگان
چکیده
منابع مشابه
Do monarch butterflies use polarized skylight for migratory orientation?
To test if migratory monarch butterflies use polarized light patterns as part of their time-compensated sun compass, we recorded their virtual flight paths in a flight simulator while the butterflies were exposed to patches of naturally polarized blue sky, artificial polarizers or a sunny sky. In addition, we tested butterflies with and without the polarized light detectors of their compound ey...
متن کاملAirspeed adjustment and lipid reserves in migratory Neotropical butterflies
1. Aerodynamic theory predicts that migrant fliers should reduce their speed of flight as endogenous energy reserves are gradually consumed. This prediction was tested for butterfly species (Pieridae and Nymphalidae) that engage in annual rainy season migrations through central Panama. 2. Direct airspeed measurements were made on butterflies in natural free flight, followed by chloroform : meth...
متن کاملSun Compass Integration of Skylight Cues in Migratory Monarch Butterflies
Migrating monarch butterflies (Danaus plexippus) use a time-compensated sun compass to navigate from eastern North America to their overwintering grounds in central Mexico. Here we describe the neuronal layout of those aspects of the butterfly's central complex likely to establish part of the internal sun compass and find them highly homologous to those of the desert locust. Intracellular recor...
متن کاملQuasi-extinction risk and population targets for the Eastern, migratory population of monarch butterflies (Danaus plexippus)
The Eastern, migratory population of monarch butterflies (Danaus plexippus), an iconic North American insect, has declined by ~80% over the last decade. The monarch's multi-generational migration between overwintering grounds in central Mexico and the summer breeding grounds in the northern U.S. and southern Canada is celebrated in all three countries and creates shared management responsibilit...
متن کاملDiscordant timing between antennae disrupts sun compass orientation in migratory monarch butterflies
To navigate during their long-distance migration, monarch butterflies (Danaus plexippus) use a time-compensated sun compass. The sun compass timing elements reside in light-entrained circadian clocks in the antennae. Here we show that either antenna is sufficient for proper time compensation. However, migrants with either antenna painted black (to block light entrainment) and the other painted ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1878
ISSN: 0036-8733
DOI: 10.1038/scientificamerican04061878-215