Newly Hatched Insects
Mantids Hatching from Ootheca
On a late winter we found a newly made Ootheca (mantid
egg case) on a plant. There were two Parasitic
Wasps (Podagrion sp.) trying to insert their eggs into the Ootheca.
The two wasps are black in colour with body length about 5mm. They both had the
very long ovipositor, more than three times of their body length. The two wasps
flied away before we pointed our camera at them.
Anyways, we took the Ootheca back home to see what would happen. About
three weeks later, we saw many young mantids emerged from the Ootheca. They came
out one by one, look like a small worm, 10mm long and pale brown in colour. They
had the first moulting immediately outside the Ootheca. Then their appearance
become exactly like their mother, except much smaller. In the about picture you
can see many empty skin cases left after their moulting. Watch more carefully
you can see one young mantid just emerging and few others still struggling in
the moulting process.
There were about a hundred of young mantids emerged. Some rested on the plant
and some actively ran around. We did not see any cannibalism, could be they were
not too hungry yet. After watching them for two days, seemed no more interesting
things will happen, we put them back into our backyard.
Beside the the emerged of the young mantids, we also see a few parasitic
wasps came out. They came out by making a small hole on the side of the Ootheca.
They look exactly as the two wasps that we mentioned above except none of them
had the long ovipositor. We might see the male wasps emerged only. As their
mothers, they flied away quickly and, again, we failed to take any picture of
Newly Hatch Hoppers
- Female Hoppers
lay eggs on tree trunks or leaves. The eggs are covered with a white waxy
secretion produced by the ovipositing female. Nymphs are usually brown
to dark brown in colour. Their habit are about the same as the adults. Like
other members in the Hemiptera
order, Planthoppers have their sucking mouth-parts to feed on host plants by
sucking up the sap.
- The hopper's eggs are also suffer the wasp parasite. It is normal to see
parasite wasps hatched from the Planthopper egg-plate.
Assassin Bug Eggs and 1st Instars
- In late summer, we found a Common
Assassin Bug and hoped that it is a female. We kept it in a large bottom
and fed it with caterpillars. About a week later, the Assassin Bug laid a
batch of eggs under the cover which we used to enclosed the bottom. The bug
soon dead after laying those eggs.
- About two weeks later, many small bugs come out from those eggs. The small
bugs look like black ants with orange abdomen. It would be hard to feed
those small bugs. We put them back to our back into the field.
- Few weeks later in the early winter, we found this 2nd instars in the
bush. We can see its strong mouth-parts well ready for hunting.
Newly Hatched Glossy Shield Bugs
- The Glossy
Shield Bug eggs are laid of 50 or more which are black in colour with
short white spines around the rim. Young instars are bright red in colour.
Later instars are dark red and brown.
- When bugs just hatched. They stay around their eggs cases. The1st instars
nymph bugs feed on bacteria which the female deposited on the eggs when she
laid them. The bugs have to liquefy the food with saliva first before they
can feed on it. Although adults are essentially predaceous,
first-instars nymphs feed on plant juices.
- As their adults, the later instars are predators. The feed on other soft
body insects, such as the caterpillars.
Owlfly Eggs and Larvae
- In mid-summer we found a cluster of eggs on grass seed stem. There were
more than 30 eggs encircling the stem. We took them home and waited to see
what would come out. A few days later, an Owlfly
larva came out from each eggs. They stayed together on the empty egg shells
motionless for one or two days. Then that started to move around. We put
them back to where we found them. The Owlfly larvae are predators live in
plant litter or on trees.
Leaf Beetle Eggs
- On early summer, we found something look like insect eggs on an Acacia
leaf, near them there was some Acacia
Leaf Beetle adults. We believed they are their eggs. We brought them
home and a week later, the eggs turned into three little beetle larvae, dark
brown in colour, with the same body shape as the later instars.
- A week later, we found another batch of eggs on an Acacia leaf, the egg
colour look a little bit different. We took them home, later in the evening,
those eggs started to hatch as shown in the above picture. The dark larvae
had came out a few minutes ago and starting to eat its egg case. The lighter
brown colour one had just came out. Watch carefully, we can see the other
two egg case were about to open.
Bramble Sawfly Larvae
- We found this group of sawfly larvae in early winter. They are pale green
in colour with black head. On another leaf of the same plant, there were
some larger larvae feeding individually. Their head became pale orange in
colour. There are two tails at the end of their abdomen.
- On the stem of the same plant, we found two adult sawflies.
We believed they are the larvae's parents, although we was not sure if they
are one male one female or both females. The adults were pale brown in
colour with long antenna.
- However, the two sawflies were very weak and slow moving if they are not
dying. When interrupted, they crawled slowly on the stem, but hardly
can fly. Some species of sawfly are known will stand guard their eggs and
young larvae. They may be the sawfly parents about to finish their duty of
guarding their babies.
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