On the Monarch Butterfly Trail

Event Monarch Sighting
Number 3
Date of Sighting 09/12/11
Comments A male monarch flew into a Jack pine tree to rest. Then another monarch came
to the trees for the same purpose. Later in the day I saw one more monarch
flitting around the garden of milkweed and native wildflowers. It is late for
monarchs to be here. I hope they leave before the weather changes later this
week.
Location Minong
State/Province WI
Latitude 46.11
Longitude -91.81
E-mail email
this observer
(—-@centurytel.net)
Observer’s First Name Mary Ellen
Observer’s Last Name Ryall
Teacher’s First Name Mary Ellen
Teacher’s Last Name Ryall
Grade
School Monarch Butterfly Habitat
City Minong
State/Province WI

Monarch Butterfly Chatbook – The Egg

THE EGG – HUEVECILLO

The male and female monarch butterfly will fly from Mexico to Texas. There they will mate and shortly thereafter die. The mother butterfly urgently needs to find milkweed to deposit her eggs on. This last act will insure the next generation of monarch butterflies. There are four generations that wind their way towards Canada. The fifth generation is the one that lives the longest and returns to Mexico in early fall. How does the butterfly know where milkweed grows?

The butterfly flits over a field or garden looking for milkweed. Watch the flight pattern and you may see a mother butterfly looking for a host plant. Plants have ultraviolet patterns on their leaves and flower petals making them visible to pollinators such as the monarch butterfly. Humans can’t see this but a butterfly can.  A monarch uses a combination of visual and chemical cues to find milkweed.

Once a mother butterfly lands on milkweed, she uses sensory organs in her feet and head to make sure it is milkweed. A monarch may even drum on a milkweed leaf with her forefeet to be certain. The forefeet are located close to the head.   

Notice that there are three eggs on the milkweed plant in the illustration. The mother butterfly carries approximately 200 eggs in her stomach. She touches the abdomen to the underside of a leaf and deposits an egg.  The mother usually deposits only one egg per plant. There is a reason for this. It is probable that the first caterpillar to emerge from an egg will scout for other eggs. A caterpillar is able to defend its own food territory when there is no competition.  Eggs have protein.  Sometimes a mother butterfly is in a hurry and may deposit more than one egg on the same plant. This is known as egg dumping.

By depositing eggs on different milkweed plants, eggs have a better chance of survival if something goes wrong.  There are many risks to milkweed including: Some plants may not be as hardy as others; a storm could destroy a plant; milkweed might be removed because a gardener thinks it is a weed; a land developer could clear cut a large track of land removing all native plants; farmers may plant monoculture crops, genetically engineered crops and may spray crops with pesticides.

There is a loss of approximately 3,000 acres of farmland each year to development. Roadside crews may use herbicides (ER-beh-syds) which poison milkweed, a plant that grows along roadways, one of the major corridors of butterflies. If there is no milkweed along the migration trail, there will be no monarch butterfly migration. This is why it is so important to let milkweed grow.