The flies from the forest

Geetha Iyer

This is the final article in the Nature Watch series. During my years as a biology teacher, I have often felt incomplete and disappointed with myself for not being able to identify several plants, insects, birds and other creatures we came across on our nature walks or outdoor biology classes. In the 1970s-90s, there were not as many field guides or books available as there are today. One was dependent on the few resource persons or people from WWF-India for information and identification. Most books on Natural History found in school libraries were about European species. It was tough to get help or information. I would forever be chasing resource people in order to become familiar with India’s biodiversity and Natural History. I also lost no opportunity to join as many field trips and nature camps to further my knowledge. But such luxuries – and believe me they are luxuries for a teacher – are not possible for everyone. The Nature series was my attempt at sharing what I had learned, so teachers would not have to run from pillar to post for knowledge.

When I retired from active teaching in 2005, and started working with teachers, I found that in many schools – especially those that were located in the smaller districts of various states, from Gujarat to Kerala, Hyderabad to Lucknow, or some even from Delhi, Mumbai and Chennai – the story of European encyclopaedia being the source of information for biology teachers was still prevalent. By the year 2000, there were some fine books and newsletters on Indian Biodiversity published and available. Thanks to Dr Madhav Gadgil’s Landscape programme, Resonance regularly published some fine articles on Natural History. Yet it had not reached very many teachers. It was also the time when Teacher Plus had moved from its tabloid format to a magazine in colour. What better way to reach out to a large number of teachers than through a magazine for teachers!

Teacher Plus was kind enough to give me space to write about the magnificent biodiversity that India has. A lot more can be written but I tried to stay with those that teachers and students can see easily or ones that a teacher can use in a biology class. Teachers needed to move away from cockroaches, mosquitoes, frogs and rats in their biology classes and instead expose children to the diversity in their neighbourhood. The series was an attempt to make learning about biodiversity more contextual. It has been a happy writing experience for me, but I have often wondered whether it was the same for you, the readers – was it useful? I have had some very positive (but limited in number) feedback about the articles, but I have never stopped wondering whether it was useful at all!

As I write the last one in this series, I have taken the liberty to move away from insects of urban areas. The insects in this article are those that reside deep inside the forests, preying on the sap sucking insects and protecting trees; what a biology teacher would categorize as “useful insects”. Occasionally, you may spot one of them, namely the lacewing, in areas that have a lot of greenery, but the scorpion fly, the dobson fly, and the mantid fly are unlikely to be seen unless you are in a wooded area or a forest. Due to space constraints, the description here is brief but you can read more about their fascinating life in my book1 (reviewed in Teacher Plus, November 2016 issue).

Net-winged insects
Among the 24 orders of insects is one called the Neuroptera comprising the net-winged insects. As the name implies, their wings are like nets covering, rather, draping their abdomen to present a very elegant appearance. Add to it the beautiful colours some of them sport, they are sure to draw admiration from anyone who looks at them. The most familiar neuropteran is perhaps the antlion which look like the damselfly. Watching an antlion larva capture ants – in the cone like pits they make – can be a very interesting nature club activity. But the insects I describe here for you are the lesser known lacewings and mantidfly. Also described are the scorpion fly and the dobsonfly that were earlier classified under Neuroptera but now are grouped under the Order Mecoptera and Megaloptera respectively.

The author is a consultant for science and environment education. She can be reached at scopsowl@gmail.com.

This is an article for subscribers only. You may request the complete article by writing to us at editorial@teacherplus.org.