How do monarch butterflies mate

It appears that the wings grow from the skin inward. Is there a lining against the inner skin that begins to form the wings? A: The skin or exoskeleton of the chrysalis is shed, in a way similar to that in which the exoskeleton of each of the previous larval instars is shed.

While it may appear that the wings and other organs grow from the skin inward, they are actually present in the larva, and grow continuously in the last larval instar. During the wandering stage after the larva has stopped eating , the tracheal system that fills the wing veins develops, and as the larva pupates, the wing assumes the shape that it will have in the adult.

We are in Louisiana and trying to have monarchs breed all winter. Some of the monarchs are emerging but their wings are slightly bent. Is it because it is cold? However, if you are breeding monarchs year around, you definitely run the risk of having the protozoan parasite Ophryocystis elektroschirra OE infect your monarchs, and OE also can result in deformed wings. To find out how to have your monarchs tested, you can go to the website www.

This project is a citizen science project run out of Dr. Blood flows through the wings even after the wings have hardened.

Blood flows from the thorax into the wings, and then back into the thorax. They are genetically programmed to do things like fly, find food, and migrate in the case of monarchs.

In some ways, this sounds like a great thing. We need to learn how to talk, walk, read, etc, but think of the flexibility we have in determining what we do with our life. Both of them mean the pupa stage of a butterfly. I think you should write a poem about all of these words!

The color itself comes from cardenolides in the milkweed that larvae eat. However, there were no differences in two experimental groups: males that were kept with females and allowed to mate naturally, and males that were kept in a cage without females. I have also seen no difference in females. Monarchs go through 4 or 5 generations each year, and only one of these migrates.

The migratory generation is the last one of a year, so it is probably the largest generation, however. The monarchs that will migrate to Mexico do not mature completely before they migrate. Even though they look just like normal adults, they are not sexually mature. They are sort of like a juvenile, or pre-puberty, person.

This happens at some point while they are developing as larvae and pupae, when they are exposed to shortening days and cooler nights.

When the butterflies are exposed to lengthening days, and possibly warmer temperatures, their reproductive organs begin to mature. I really like the 2x2x2 foot cages that Bioquip sells. Or, you could make your own cage check out the directions in our curriculum guide. We make cages in our lab from plywood and screen that work pretty well, and the directions for these are in our guide. You just need to be a little handy with a staple gun, sewing machine, and screw driver!

Monarch Butterflies. Fall monarchs look like other monarchs. They are physiologically different, however, emerging from the pupa in a state called reproductive diapause. Diapause is a period of suspended development produced by changes in their hormonal levels; fall individuals do not have the mature internal sex organs testes and ovaries that the summer generations have. A variety of signals from nature combine to induce this diapause condition, including shortening day length, changes in temperature between day and night, and even the age of the milkweed plants that they had eaten as larvae.

Beginning in late August and continuing through September and October, these individual monarchs fly up to 2, miles south to the Transvolcanic mountain range of central Mexico.

They drink nectar and conserve energy, catching warm air currents blowing to the south that allow them to soar instead of using powered flight as they go.

In Mexico, monarchs find the south-facing slopes of high mountains and settle on branches and trunks of oyamel fir trees, forming dense clusters.

This way, they can conserve their energy until warmer spring weather returns. Monarchs that pass the winter in the mountains of central Mexico are the final generation each year. In late February and March, monarchs end reproductive diapause, becoming ready to mate and lay eggs as they move northward.

Once they become reproductively active, they live only another few weeks. Their eggs then mark the start of another annual life cycle, as the first summer generation of monarchs is born again. Unlike the summer generations, which live for weeks as adults, the overwintering generation of butterflies lives months — surviving a long southward migration, several months in Mexico, and a northward migration back into the southern United States.

Monarch butterflies have evolved to live this way, with special adaptations that allow them to survive seasonal changes to their habitats. Nectar plants, milkweed, water, and the oyamel fir forests in Mexico are all crucial to continue this annual life cycle.

Monarchs compete with human needs for land and resources wherever they are. Efforts to provide suitable habitat for monarchs are linked to supporting the needs of the local residents who have shared the same region with the butterflies for many generations. Females begin laying eggs immediately after their first mating, and both sexes can mate several times during their lives.

Adults in summer generations live from two to five weeks. Each year, the final generation of monarchs, adults that emerge in late summer and early fall, has an additional job. They migrate to overwintering grounds, either in central Mexico for eastern monarchs or in California for western monarchs.

Here they spend the winter clustered in trees until weather and temperature conditions allow them to return to their breeding grounds. These adults can live up to nine months. Male and female monarchs can be distinguished easily.