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Insect winter ecology describes the overwinter survival strategies of insects, which are in many respects more similar to those of plants than to many other animals, such as mammals and birds. Unlike those animals, which can generate their own heat internally ( endothermic ), insects must rely on external sources to provide their heat ...
The butterflies arrive at their roosting sites in November. They remain in roosts atop volcanic mountains on oyamel fir trees (Abies religiosa) during the winter months and then begin their northern migration in March, back to North America and southern Canada. Two to three generations of monarchs complete the migration north.
Many migrating butterflies fly at low altitudes. The airspeeds in this region are typically lower than the flight speed of the insect, allowing them to travel against the wind if need be. These 'boundary-layer' migrants include the larger day-flying insects, and their low-altitude flight is easier to observe than that of most high-altitude ...
After wintering in Mexico, the butterflies fly north, breeding multiple generations along the way for thousands of miles. The offspring that reach southern Canada begin the trip back to Mexico at ...
Federal wildlife officials on Tuesday proposed protecting the striking long-distance migrators under the Endangered Species Act after dramatic population drops.
The black-and-orange butterflies are spending the winter soaking up some California sunshine. Monarch butterflies are fluttering along California coast. Here’s where you can see them
In case of headwind, they usually fly low and are more goal-oriented. [7] During migration, some species can be found at high altitudes, ranging to up to two kilometers. [ 8 ] [ 9 ] This is especially noteworthy for day-flying species like Vanessa atalanta , since the temperatures on these altitudes are low and day-flying species depend on the ...
Lepidoptera (/ ˌ l ɛ p ɪ ˈ d ɒ p t ər ə / LEP-ih-DOP-tər-ə) or lepidopterans is an order of winged insects which includes butterflies and moths.About 180,000 species of the Lepidoptera have been described, representing 10% of the total described species of living organisms, [1] [2] making it the second largest insect order (behind Coleoptera) with 126 families [3] and 46 superfamilies ...