Showing posts with label milkweed critters. Show all posts
Showing posts with label milkweed critters. Show all posts

Sunday, 3 August 2014

How to spot a Monarch butterfly caterpillar!

Milkweed Tussock Moth caterpillars
If you recall, I've been following the Milkweed
Teeny Tussock caterpillar
plant that was covered in Milkweed Tussock Moth caterpillars. I don't think I've ever grossed out my Hydrogeologist daughter, who has been stung by wasps out in the field, and spends a certain amount of time outdoors wearing a hard hat, but I did! The crawling, seething mass of caterpillars were too much for her!

 They have moved from leaf to leaf, totally rendering the leaves into skeletons, dropping their little caterpillar poo on the leaf below. They don't seem to hurt the plant, since the plants have already bloomed and are producing seeds later this month. Plus, there are thousands of caterpillars on just the one plant, and I have hundreds of other Milkweed plants on the property. In a way, they are efficient.

The Latest critters in Milkweed plants

Another mystery egg!
Wicked Goldenrod Crab spider!
They attack wasps & bees!
In my search, I keep finding new critters who depend upon, or enjoy the Milkweed plant. The Monarch caterpillar eggs are white, as are the Tussock eggs.
Matchy-matchy, see the moth?

Red Milkweed beetle
starts eating on the edge

Tree frog,
with Red milkweed beetle damage on the leaf.

 I was checking on the progress of my Tussock caterpillars, intrigued with their life cycle, and couldn't find them. They are obvious, since they are so abundant in one spot.

How to hunt for caterpillars

Hundreds of Milkweed Tussock caterpillars

My strategy is to first look for a Milkweed plant with damage, then gently lean the plant over, while trying to avoid getting bitten by Deerflies.

When I hunt for Monarch caterpillars, I've found that there is usually a hole in the middle of the leaf, where the caterpillar hatched from the egg, then it moves about on the leaves. The Red Milkweed beetle starts at the edges of the leaves and eats out chunks.

As I realized the Tussocks were all gone, I noticed another Monarch caterpillar! At that point, I began to wonder how many eggs they actually lay.
Monarch butterfly
The ones that migrate to visit us in the north,
are different than those who stay further south.
Ours have longer life cycles.

The answer is, they don't really know. All they can do is speculate from those who have laid eggs in captivity.


Monarch butterfly notes by Dr. Karen Oberhauser
Q. How many eggs do the monarch butterflies lay in one time?
A. They only lay one egg at a time, and usually one per plant, but they can lay many in a single day. (The most I've seen is 205 in one day, but this is very unusual.)

Q. What is the most eggs a monarch has ever laid?
A.
 I have no way of knowing how many eggs wild females lay. However, I have studied fecundity (number of eggs laid) by captive females, and they highest number I've seen was 1179 during their lifecycle. The average is about 700, but this varies from year to year. They lay fewer in hot, dry summers.
Monarch butterfly

Monarch Lifecycle
The Monarch butterflies go through prolonged stages of metamorphoses , starting with its larva or caterpillar, shedding or molting its skin an amazing five times before the pupa stage.  You can see a diagram of the monarch life cycle that you can color in hereOur articles are free for you to copy and distribute.

Saturday, 2 August 2014

Milkweed Tussock Moth: Euchaetes egle from eggs to caterpillar

Finally, I snagged photos of a milkweed tussock moth!



These weeny little caterpillars are Milkweed Tussock moth eggs, and larvae, as confirmed on BAMONA. They begin at Day 1, Day 2 you could see spots, day 3, they turned white and another critter dropped some eggs beside them! Totally decimating the plant, they work leaf-by-leaf, leaving their droppings underneath on the leaf.

Milkweed Tussock Moth or Milkweed Tiger Moth
I have yet to photograph one!

Euchaetes egle (Drury, 1773)

Family: Erebidae
Subfamily: Arctiinae

Egg masses are laid on the leaf.

These are the cutest little caterpillars.




Visit more critters


Monday, 28 July 2014

More Milkweed critters; part 3: Charlotte's web spider family

Yes! Charlotte is on a milkweed plant, with all her little children! I've been enjoying my Macro lens and the various critters on my ubiquitous Milkweed plants.


Saturday, 26 July 2014

More milkweed critters: caterpillars

I'm encouraging milkweed
even in my gardens!
I posted a series of photos of the critters who either depend
upon the Common Milkweed plant for food (which is unusual, since it is poisonous to some) or eat the critters that feed on the milkweed.
[Visit more Saturday's Critters at Eileen's blogspot.]

The white 'milk' drips where critters break a branch. I think our raccoons, or somebody in our forest, breaks the plant, bending it over wince the scent of the blossom is so sweet. I'm not sure, though!
The second one I've found!

From fcps.edu: they have a great chart which illustrates the critters who feed on this plant, shelter within it, and plants which are associated with it.
They also explain the poisonous aspect of the Common Milkweed. It does poison domestic animals, goats, sheep, etc., as well as crowding out crops. Many farmers kill it off.

This sap has poisons in it, called Cardiac Glycosides. Some animals can eat the glycosides and not be harmed. When the Monarch butterfly's caterpillar munches the leaves of milkweed, the glycosides go into its body, making the caterpillar poisonous to predators. Even after the caterpillar has changed into an adult butterfly, it keeps the glycosides in its body.

These weeny little caterpillars are Milkweed Tussock moth larvae, as confirmed on BAMONA. They seem a bit
Milkweed Tussock caterpillars
They devour the entire leaf!
Thankfully, we have a lot of milkweed about.
furry, but, unlike the Monarch caterpillar, they haven't any colourings. I will continue to watch them. They totally devours the leaves, as a group, then move on to another leaf. I can only predict this from what I observed last year!

It's tough identifying some. There are several on-line sources to help, many run by volunteers! This one allows you to match by visual identifiers.

The monarch caterpillars are easy to ID, since they have the familiar green/black stripes upon hatching and they don't have fuzzy hair to grow!

Mystery caterpillar
Many have the same hairy appearance
with a wide variety of colours.
Can you believe the size of it?!
I stumped my BAMONA regional expert last month with this fuzzy little guy (left). He couldn't officially ID it, either!

There are caterpillars all over the place! This one I found on my front deck.

Here are what I believe are the Milkweed Tussock Moth caterpillars.