🪽 Why Don’t All Wings Come in Pairs?

Sailekshmi · January 2, 2026, 4:56pm

CUBE ChatShaala – whiteboard Summary

Date: 02 January 2026

Overview
The ChatShaala session centered on understanding body plan organization across organisms through a simple yet powerful narrative approach. Using the “Pigeon Story” shared by Shama as a starting point, the discussion moved fluidly across birds and insects to highlight how structural similarities and differences reflect function, classification, and evolution. The whiteboard illustrations played a key role in grounding abstract biological concepts in visual reasoning.

Key Discussion Points
The session began with the pigeon as a familiar vertebrate model, emphasizing its identity as a bird with two wings adapted from forelimbs. This was contrasted with insects such as butterflies and fruit flies, which possess four wings (in butterflies) or two functional wings (in fruit flies), highlighting diversity within the insect group.

A major focus was the head–thorax–abdomen (HTA) body plan, clearly illustrated in insects and compared with the human body organization. This comparison helped Cubists recognize that while humans and insects differ vastly, the idea of body regions specialized for distinct functions is a shared biological principle. The thorax as the center of locomotion in insects, bearing wings and legs, was a particularly important takeaway.

The drawings encouraged Cubists to think beyond memorization and instead reason why wings arise from the thorax, why insects are classified separately from birds, and how form follows function.

Proactive Queries to inspire

If butterflies have four wings and birds have only two, what does that tell us about their evolutionary paths?
Are the wings of birds and insects truly comparable, or do they only look similar?
Why does the head–thorax–abdomen plan work so well for insects but not for humans?
Is it the number of wings, body segments, or something deeper?

What I Learned

Visual storytelling can simplify complex biological classifications without losing scientific accuracy.
The thorax is not just a body segment but a functional hub in insects, integrating movement and flight.
Similar-looking structures (like wings) may have entirely different origins and meanings in biology.
Comparing humans with insects is a powerful way to challenge anthropocentric thinking in biology.

TINKE Moments (This I Never Knew Earlier)

Fruit flies are described as having two wings functionally, even though they belong to a group where four-winged ancestors existed.
Wings in insects are not limbs in the same way bird wings are modified forelimbs.
Simple hand-drawn diagrams can sometimes convey conceptual clarity better than polished textbook images.

Gaps and Misconceptions

A common misconception was assuming that all flying animals evolved wings in the same way.
Some participants initially thought the abdomen played a role in wing attachment in insects.
There was confusion between number of wings and classification, highlighting the need to emphasize multiple diagnostic features rather than a single trait.

photographs during Chatshaala

Shama Sayyed - Bangalore, Karnataka

M S Sailekshmi - Trivandrum, Kerala

Reference

Closing Reflection
Today’s ChatShaala reminded us that biology is best understood when observation, questioning, and imagination work together. By slowing down and truly looking at structures we think we already know, we uncover deeper patterns—and sometimes, entirely new questions worth asking.