INSECTS and SPIDERS

Spectacularly diverse, often colorful
classes of animals, some much beloved,
that play such significant, but often
overlooked roles in our lives. Presented in
magnificent closeups with detailed texts.

AQUATIC INSECTS & MONARCH METAMORPHOSIS
Details the unique adaptations of certain insects to aquatic habitats. Presents met- amorphosis, the magical change from cat- erpillar to butterfly. 2 pgms.40 slides, texts.
EP #452X SLIDES
$72.50

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SAVE $12.50 ON 2 SLIDE SET BUNDLE ORDER EP #452X.....$72.50
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REPRESENTATIVE AQUATIC INSECTS Order #452........$42.50

Revised 1999

A survey of common insects which occur in freshwater environments and details
of their life history and significance. Includes close-ups of mayfly and stonefly nymphs,
giant water bug, backswimmer, water boatman, water strider, water tiger, predaceous
diving beetle, water scavenger beetle, whirligig beetle, dragonfly and damselfly nymphs,
caddisfly, black fly and mosquito larvae and hellgrammite. 2O slides and detailed guide
with images for easy reference.

CONTENT SAMPLE: 21025 This predaceous diving beetle is the adult form of the
water tiger and it too is an aquatic predator. While its mandibles are not nearly as sharp as
those of the water tiger, they are nonetheless capable of crushing the hard exoskeleton (outer
shell) of other insects.

Most predaceous diving beetles vary in size from 7 to 50 mm (0.25 to 2 in.) in length,
depending on the particular species. Many are brown or black and some have bright yellow
markings. Like scuba divers, predaceous diving beetles carry their air supply with them. An air
bubble is stored under the forewings, enabling them to stay submerged for long periods of time.
In this picture, part of the air bubble can be seen protruding from the rear of the abdomen.

REVIEWS: "An excellent slide program..." Previews.
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INSECT METAMORPHOSIS--THE MONARCH BUTTERFLY Order #436......$42.50

Close-up photography and lucid text detail the astonishing changes that take
place in the life cycle of the monarch butterfly as it goes through complete meta-
morphosis, from egg to adult. Pictures illustrate eggs, larva, caterpillar, molting,
cremaster, prepupa, pupa, emergence and adult. 20 slides and guide.

CONTENT SAMPLE: 13363 Monarch caterpillars, like most other larvae, have very
specific food requirements. They feed only on plants of the milkweed family and on some of the
nightshades. Monarch larvae can convert as much as 31% of the carbohydrate present in
milkweed into fat.

This milkweed plant has on it three larvae at different stages of growth. The largest one
is fully grown. The smaller two must go through several more molts. Before they become adult,
monarch larvae go through five molts over a span of 10 to 14 days. The exact time varies with
the temperature. In the process they eat so voraciously that milkweed plants are often reduced
to shreds and tatters.

The specialized food preferences of monarch larvae are responsible for the fact that
some monarchs, both larvae and adults, are poisonous to birds, while others are not. There are
103 species of milkweed in North America--some are quite poisonous, some are mildly
poisonous, some are not poisonous at all. Depending on the nature of the particular plants the
caterpillar has fed on, the animal’s body may or may not contain significant amounts of the
poisonous cardiac glycosides found in milkweeds. This accounts for the fact that monarchs are
sometimes less preyed upon by birds than might be expected.

Some birds do prey upon monarchs, but they have learned to tell the poisonous ones
from the nonpoisonous ones by taste. They quickly spit out the poisonous ones. Often, adult
monarchs are found with triangular pieces bitten out of their wings--they were tasted and
discarded by some bird.

It seems likely that even birds of the same species will differ in their eagerness to eat
monarchs. A bird that has had some “good” monarchs before it got one that made him sick will
probably go on eating at least some monarchs, while a bird that was made sick by the first four
or five monarchs it ate, may never touch another. The nonpoisonous viceroy butterfly mentioned
earlier, because of its close mimicking of the monarch, is often passed over by birds that have
had bad experiences eating monarchs.

REVIEWS: “A classical, photographic essay...” Previews.

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RELATED PROGRAMS WORTH NOTING
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A CLOSER LOOK AT PONDLIFE---CD-ROM Order #CDR-1565....$79.95
Lab Pack of 5 Order #CDR-1566....$159.95
Library Pack of 20 Order #CDR-1567....$559.95
Network Version (single server, one building) Order #CDR-1567N....$239.95

New 1999
Combined IBM/MAC Format

Through the wonders of close-up photography, this unique CD-ROM brings
students face-to-face with the inner workings of a freshwater pond, the myriad creatures
and plants that reside there, and the dynamic interactions that go on beneath the surface.
This disk features a library of reference information, images, illustrations, clip art, video
clips and more!

Section One provides a general overview of ecosystems in general and the pond
ecosystem in particular, and introduces the various life forms that reside there. These
include emergent and submerged rooted water plants, microscopic and small
macroscopic animals, aquatic insects, molluscs, amphibians, reptiles, birds and
mammals. Spring and fall overturns are explained and numerous links lead students to
images and text that round out their understanding.

Section Two delves into microscopic pond life in great detail, covering: the
different types of cells, eubacteria, cyanobacteria, euglenoids, diatoms, desmids,
dinoflagellates, flagellates, amoebas, ciliates, suctorians and green protists. Eye
stopping photographs of many examples accompany detailed information.

Section Three presents pond plants and information about how they grow and
reproduce, an what lives on and among them: larch, weeping willow, paper birch, poplar,
alder, jewelweed, ferns, mosses, phragmites, aromatic water lily, variable pond weed,
floating heart, submergent rooted plants, cardinal flower, sundew.

With more striking close-up photographs, Section Four presents the small
invertebrate life that is so plentiful amid the shallow water vegetation and pond sediments:
rotifers, gastrotrichs, hydras, flatworms, nematodes, bryozoans, microannelids,
cladocerans (water fleas), and microcrustaceans. Again, numerous links connect these
creatures to other members of the pond community.

Section Five introduces food chains and trophic levels, photosynthesizers,
herbivores, carnivores, omnivores and decomposers. In the process, the numerous pond
vertebrates—fish, amphibians, reptiles, birds and mammals—are reintroduced and
presented in depth, along with the microlife forms previously covered. Life styles, feeding
behavior, mating and reproduction, as well as their dependence on other pond life are
presented for the vertebrates.

Section Six provides Field Trip and Laboratory tips. Various classroom and field
projects, ways to collect and preserve specimens, how to calculate a diversity index,
safety considerations, etc.

Section Seven is a unique curriculum section that provides the means to link the
vast library of resources to key, curriculum-based science topics.

Can be used with either Windows or Mac. Color printer recommended.
System Requirements:
Windows 95 or higher, 16MB RAM. Sound card recommended.
Mac 7.5 or higher, 16MB RAM.
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EXPLORING FRESHWATER COMMUNITIES--CD-ROM Order #CDR-1550.........$99.95
Lab Pack of 5 Order #CDR-1550-5.........$199.95

Combined IBM/MAC Format

This indispensable interactive CD-ROM is a complete resource for studying
freshwater biomes.

It provides a fascinating survey of the ecology of swamps, bogs, marshes,
wetlands, streams, ponds, lakes and the Everglades. There is even an introduction to
fish restoration and water pollution.

It also explores the various organisms commonly found associated with these
waters--fish, plankton, protozoa, aquatic insects, amphibians, reptiles, birds and plants,
and emphasizes their special adaptations, feeding habits and the complex interactions
among them.

This program is an instant curriculum-oriented encyclopedia, augmented with
printable diagrams and illustrations, superb photographs, video clips, informative text, lab
activities, and a Protists Culture Database--all on one CD-ROM.

The extensive library of illustrations and diagrams supplements those found in
textbooks.

The Protist Culture Database makes it easy to find over 125 protist genera, and
iIncludes morphologic characteristics, culture parameters and media formulations.

Printable lab activities and laboratory activity tips at the end of each section
help make your ecology labs and field trips more successful than ever before.

Recommended for use with popular biology texts such as Holt: Modern Biology,
Chapter 49, and Prentice Hall: Biology, Chapter 47.

CONTENT SAMPLE:

There are four major types of wetlands: marsh, swamp, fen and bog. Exact classification
is not always possible, since characteristics of more than one type often occur together. In fact,
wetland ecologists sometimes disagree on exactly what these names mean. Before looking at a
bog, in detail, let's briefly consider these four types of wetlands.

A marsh is defined as a wet, open, grassy area with a fluctuating, but always shallow,
water level. The water is either standing or slowly moving. The substratum, or bottom, consists
of mineral soils with or without organic matter.

Both dissolved oxygen and mineral nutrients in the water are present in ample supply.
As a result, marshes can support an abundance of living organisms. Dominant vegetation in
marshes consists of rushes, reeds, reedgrasses, and numerous floating and, in areas of open
water, submerged aquatic plants.

Trees and shrubs are present only near the edges and on small islands of land within the
marsh.

The Everglades region of Florida is a well-known wetland primarily marsh in character.
Copyright (c) MCMXCVI
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~0072-086~ Monarch ready to emerge. photo by Mark Warner.

Copyright (c) MCMXCVIII Educational Images Ltd., Elmira, NY, USA. All rights reserved.

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