Interesting Insects (1.5 hours)

Over 73% of all identified animal species belong to the insect group (80% when arachnids are included).  In this field study, students will investigate the 8 most common orders of insects (orthoptera, heteroptera, homoptera, odonata, lepidoptera, coleoptera, hymenoptera and diptera).  Students will learn that adult insect bodies are divided into three major segments; head, thorax and abdomen and;  the structures commonly found on each segment (head - sensory organs eg. eyes, mouth, antennae; thorax - wings, legs [internally, heart, lungs]; abdomen - ovipositer/stinger [internally, reproductive and digestive]. Students will be shown examples of the eight orders, with a short discussion on the important differences in identifying the orders as well as an examination of the two major types of mouthparts (chewing, sucking) and variations, with species specific examples.  A explanation of gradual and complete metamorphosis, as well as the differences between nymph and larvae will be given, with examples for each. 

Going outside, students will use nets to catch and identify a variety of insects (and orders), found in field, forest and aquatic habitats.  Upon completion of this activity, students will return to the Nature Center and will be assisted in arranging the collected insects into their respective orders. Students will learn to identify the common insects and their allies, understand the various types of mouths, feeding styles, and understand that insects are categorized according to certain physical characteristics.