If you were to count the number of insects feeding on a big tree what kind of pyramid would you get? Now add an estimate of the number of small birds depending on the insects, as also the number of larger birds eating the smaller.

Draw the shape you would get from the above-mentioned data.

• Depending upon the given data, a spindle-shaped pyramid could be observed. This indicates the pyramid of numbers. In this, the number of the tree will remain only one.
• However, the number of insects will be in a large number. However, the number decreases from small birds to larger birds.
• This indicates the number of primaries, secondary and tertiary consumers.