Connected on 2013-10-04 15:15:00 from Santa Barbara, California, United States
- Bugscope Team sample is in 'scope and pumping down
- Bugscope Team hello!
- Bugscope Team welcome to Bugscope!
- Guest Hi! Here from NC with my bug-loving daughters (4 and 6)
- Bugscope Team Hello!
- Bugscope Team Welcome to Bugscope!
- Bugscope Team Leigh Ann please let us know when you have questions.
- Teacher Hi. Thank you for letting us watch Bugscope!
- Bugscope Team So Amy you have control of the microscope
- Bugscope Team This is likely a buprestid, metallic wood borer.
- Bugscope Team you can click on any of the presets, to the left (lefthand screen), and the 'scope will drive to that place
- Bugscope Team The emerald ash borer is in this beetle family.
- Teacher Cool! What does it eat?
- Bugscope Team some of the beetles in this family are pretty cool, and locate hosts using infrared heat sensors
- Bugscope Team and they go after hosts that have just been or are burning
- Bugscope Team they eat plants -- the woody and non-woody portions of plants
- Bugscope Team so they feed on trees
- Teacher Does it burn its food?
Bugscope Team no they wait for natural fires that occur or when there are prescribed burns
- Bugscope Team it's really cool to see how its head is streamlined
- Teacher Where does it live?
Bugscope Team I think this one is local to Illinois.
Bugscope Team the larvae feed and develop in trees feeding on the phloem
- Bugscope Team its eyes and antennae and its tiny mandibles are all neatly folded into the shape of its head, for boring
- Teacher Is this a strong insect?
Bugscope Team its little jaws are strong
- Bugscope Team this is a cute little ladybug
- Bugscope Team before it becomes the beetle we're used to
- Bugscope Team they are predators both as larvae and as beetles, as adults
- Bugscope Team they are predators and some species are used as bio-control
- Teacher Have the wings grown yet?
Bugscope Team no it will not get wings until it becomes an adult
- Bugscope Team Joe could correct me, but I believe that all insects, once they get wings, are adults and do not change; they don't molt, for example, once they have wings
Bugscope Team yup
Bugscope Team mayflies are a potential exception to this
- Teacher Can you show us its eyes? Does it see?
Bugscope Team the two mounds running along the center of the image are eyes, which are called stemmata in caterpillars
- Bugscope Team the thing to the right, center, is its antenna
- Teacher How long until it is an adult?
Bugscope Team they're said to take 3 to 4 weeks to become adults, in part depending on the weather
- Teacher Can you tell us about what we are looking at?
Bugscope Team this is the compound eye of a cranefly, which looks to us like a giant mosquito but is harmless
- Bugscope Team we're looking at only one of the eye facets, which are called ommatidia
- Teacher What is the white stuff on the eye?
- Bugscope Team the little things that resemble whiffle balls are called brochosomes
- Bugscope Team the brochosomes are so small we can hardly resolve them at these settings on the 'scope
- Bugscope Team they're actually nanoparticles -- 250 to 400 nanometers in diameter
- Bugscope Team brochosomes are produced solely by the insects called leafhoppers
- Bugscope Team but we find them on other insects
- Bugscope Team you can see a rectangular mark where we had parked the electron beam for a while
- Bugscope Team now we can see the cranefly's whole head
- Bugscope Team its antennae are pointing forward, to the right
- Bugscope Team see the little dot on the back of its head, to the left?
- Teacher How does it see? Does it see a lot of images?
Bugscope Team it sees a lot of images but processes them like a mosaic
- Bugscope Team The compound eye gives them a vision that's sort of a mosaic
- Bugscope Team having compound eyes is an advantage because it gives the insect much better peripheral vision
- Bugscope Team this doesn't give them high resolution, but allows them to process movements quicker
- Bugscope Team also, compound eyes make their bearer more sensitive to motion -- as Joe just said
- Bugscope Team the raised dot on the back of the head is another type of eye called an ocellus
- Bugscope Team the bump that you see to the left of the compound eye is a ocellus
- Bugscope Team flying insects often have ocelli, and they have three of them, usually
- Teacher What is an ocellus and what does it do?
- Bugscope Team this is a simple eye, it's believed to be mostly light sensitive, so it is sensitive to light and dark, but doesn't actually process images
- Bugscope Team the cicada killer, also in this set of specimens, has three large ocelli
- Bugscope Team it's also believed that the simple eye helps them orient during flight
- Bugscope Team Joe and I are in different buildings, kind of telling you the same things sometimes
- Bugscope Team yea sorry about that
- Bugscope Team and they don't have noses, generally, or ears, for the most part
- Bugscope Team they breathe, or control the intake/egress of air, through pores called spiracles that they can open and close at will
- Bugscope Team on the inside of the body, the spiracles connect with tracheae, which are little tubes that carry air to the internal organs, which are different from ours
- Bugscope Team insects do not have skin like we do, with nerve endings in it
Bugscope Team this is what all the hairs (setae) you see all over an insect's body is for
Bugscope Team the setae sense movements (air, touch, etc..), they are also used in propriosensing (self awareness of where appendages are)
Bugscope Team setae also provide some form of thermoregulation
- Bugscope Team this is a small fly, like a housefly
- Bugscope Team the two things we see now, on top of the head are the antennae
- Teacher What is on top of it?
Bugscope Team i believe those are its antennae
- Bugscope Team the antennae have a pad-like element that has internal components that help the fly sense the vibrations of other flies' wings
- Teacher What is that nose type looking thing?
Bugscope Team that is the mouth, in this case sponging mouthparts
- Teacher Can you show us a spider or a bee?
- Bugscope Team many flies, like houseflies and fruitflies, have sponging mouthparts that apply saliva to a surface and then suck up what dissolves
- Bugscope Team here you can see how these flies have gigantic eyes, which is one reason they're so hard to swat, since they're able to see almost all the way around their heads
- Bugscope Team can you count the eyes here?\
- Bugscope Team the spider is facing the northwest
- Bugscope Team spiders are not insects, as you know\
- Bugscope Team one way we can tell they are not insects is that they have eight rather than six legs
- Bugscope Team also, they do not have a head and a thorax, like an insect
- Bugscope Team spiders usually have 6 or 8 eyes, rarely some have 0 or 2
- Bugscope Team the things I was calling palps are the chelicers, or chelicerae
- Bugscope Team actually, they have separate palps, and those of the males are larger
- Teacher Is this the front? Or what does it look like in the front?
Bugscope Team we have to make a choice when we place an insect or arthropod on the stub, and in this case we put it dorsal side up
Bugscope Team from the front we would see two large palps, and below them we would see the fangs, curved inward
Bugscope Team you're looking at the spider kind of top down, there are 4 eyes on the top, and 4 eyes on that front edge
- Bugscope Team now we're zooming in on the top of the head
- Bugscope Team good job driving!
- Teacher How do you know if it is a boy or a girl?
Bugscope Team boys are often smaller, but if you don't have two it's hard to tell. boys also have larger palps
- Bugscope Team now we're looking at plumose setae, kind of like pine trees
- Bugscope Team spiders are very sensitive to vibration, and even with eight eyes they often do not see very well
- Teacher What is a palp?
Bugscope Team a palp is an accessory mouthpart, like a feeler near the mouth
- Teacher Why do spiders go towards you instead of away?
Bugscope Team maybe they are trying to scare you -- they are quite vulnerable, however
- Bugscope Team spiders have soft bodies. if you dropped a tarantula, it would break open if its legs did not break its fall
- Teacher It works! What is the circles? Is it where the hairs grow?
Bugscope Team haha Yes it does! Yes that is where some of the hairs have been lost
- Teacher What is the spider's weakness? Is it its soft body?
Bugscope Team yes and they also dry up easily
Bugscope Team their appendages are also pretty fragile, so some can lose their legs easily
- Bugscope Team a tarantula's urticating hairs can get lodged in the surface of your eye
- Bugscope Team some spiders have tiny hairs, called urticating hairs, that they can project at you to keep you away
Bugscope Team urticating hairs are also present in some caterpillars, so be careful of what you touch!
- Teacher Can you show us the spinner area?
Bugscope Team I'm sorry -- now we're where the spinnerets would be, but the abdomen is soft and shrivels quickly when the spider dies -- it shriveled up
- Teacher Are those old web pieces?
Bugscope Team yes we are seeing some leftover web. spiders can recycle their web by eating it
- Bugscope Team web comes in different thicknesses and also in different stickinesses
- Bugscope Team you can see some of those plumose setae beneath the web
- Teacher How many eggs can they lay? And can they swim?
Bugscope Team some can lay thousands of eggs, but it really depends on the species
Bugscope Team i'm not too sure on the swimming and how common that is, but there is a spider called diving bell spider, and it can dive into the water
Bugscope Team this spider lives its entire life under water
- Teacher Are those hairs in the background? Why would one web be less sticky?
Bugscope Team they can chew their way out of their own web if they get caught in it, but they also produce nonsticky web for themselves to walk on
- Teacher Is this a web?
Bugscope Team this is the stinger of a cicada killer wasp, or hornet
- Bugscope Team there is web on it, and we also see some bee setae, which are branched
- Bugscope Team the cicada killer does not sting people unless they are really bothering it
- Bugscope Team it uses its stinger to inject venom into a cicada that paralyzes the cicada
- Bugscope Team then it flies the cicada to its nest, in the dirt, and it lays an egg on the cicada
- Bugscope Team stingers are ovipositors
- Teacher Can we see more of its body?
Bugscope Team yes!
- Bugscope Team it is so large we cannot see it all at once
- Teacher What is an ovipositor?
Bugscope Team ova are eggs, so an ovipositor is an egg-depositor
- Teacher Is that the head and antennae?
Bugscope Team yes it is!
- Bugscope Team one of the antennae is broken
- Bugscope Team you can see down into it
- Teacher So, it doesn't eat the cicada? Just lay eggs on it?
Bugscope Team the larvae, when they hatch, will eat the cicada
- Bugscope Team you can see hundreds of ommatidia -- the eye facets
- Bugscope Team there can be, in a large hornet's compound eye, as many as 30,000 ommatidia
- Bugscope Team those tubes are tracheae\
- Teacher We thank you so much!!! You are awesome!
- Teacher We have to get ready to go home for the day. We thank you very much for this great chance to see the insects and the spider.
Bugscope Team Thank you! We enjoyed working with you!
- Bugscope Team I'm going to ask Leigh Ann if she is still here...
- Bugscope Team We had a good time working with you, Amy!
- Bugscope Team Leigh Ann please let us know if you would like to drive, if you are still online.
- Bugscope Team I gave you control of the microscope.
- Teacher My class had a great time. Thank you. We enjoyed this so much.
Bugscope Team Sweet! See you next year!
- Teacher Goodbye
Bugscope Team Bye!
- Bugscope Team Leigh Ann I will be shutting down soon...
- Bugscope Team thank you, everyone!
- Bugscope Team have a good weekend!