Category Zoology

How are butterflies classified?

Although butterflies are one of the most widely studied insect groups, there is no uniform method to classify them.

        The Symposium of the Royal Entomological Society of London subdivided butterflies into two super-families – the Hesperioidea and the Papilionoidea.

       The first group that is the Hesperioidea has only one family. Skippers as they popularly known, are very good fliers. They are called so because of their ability to fly very fast. They are very similar to moths. Many skippers are dull in colour, like moths. Their larvae feed on a lot of food plants. They rest as pupa in the cocoon, where pieces of dried up leaves are mixed.

What are the physical defense mechanisms commonly employed by butterflies?

Some butterflies have physical defenses. This behavior is common among caterpillars in temperate countries. An example of such a caterpillar is the Nymphalis. If somebody disturbs such caterpillars, they react in unison by lifting their heads up, and thrashing them from side to side to display anger. This method is useful in scaring smaller predators.

      Spines are also an important part of butterflies’ that they use to defend themselves from other wasps and flies. Aposematism or denoting colouration or markings that serves to warn the markings that serves to warn the predators is another good way to frighten away enemies

        The common Mormon of India has female morphs which imitate the unpalatable red-bodies swallowtails, the common rose, and the crimson roes.

Why do some butterflies mimic their neighboring species?

Some butterfly species mimic their neighboring poisonous species to ward off the predators. They often mimic their neighboring species by copying the latter’s colour pattern, along with producing an unpleasant smell and taste.

        Birds and other predators that are familiar with the warning patterns or bright colours of the harmful species mistake these imitator butterflies for their harmful counterparts and go away.

        One such species of butterflies which is good at mimicking is the Ecuador small postman butterfly, which imitates its equally poisonous rainforest neighbor the Ecuador postman butterfly.

What are the main food items of a butterfly?

Butterflies feed primarily on nectar from flowers. They suck nectar and other liquids through a small pipe under their heads. This small pipe is called ‘proboscis’. They sip water from damp patches for hydration, and feed on nectar from flowers to obtain sugar for energy.

       Some butterflies get nourished by pollen, tree sap, rotting fruit, dung, and dissolved minerals in wet sand, or dirt. Butterflies are pollinators for some species of plants.

      Usually, they do not carry as much pollen load as bees. However, they are capable of transporting pollen over a great distance.

       Some butterflies visit only certain flowers, and avoid others. This phenomenon is called flower constancy. Attracted by the salt in human sweat, sometimes butterflies even land on people.

What is memory?

It is the store of things learned and retained from our activity or experience. Our memory is a collection of knowledge, experiences, impressions, skills, habits, and many other things. It gives us the ability to learn and adapt from previous experiences as well as to build relationships. It has a lifelong storage capacity, and no computer of the world can match its performance. Short-term memory is the information that we are currently thinking of and it lasts for only a few seconds. Important things which we have experienced and would not like to forget are transferred from short-term memory into long-term memory.

How do nerve cells transmit signals?

Signal transmission through nerve cells is quite complicated. Like all the other cells, nerve cells also have a cell body with a nucleus. There are fine extended branches known as dendrites and a long ‘tail’ called the axon on the body of the nerve cells. Axons in the brain are smaller than 1 mm, whereas in the spinal cord they can be as long as 1 m. A chemical substance is released through an electrical impulse into the synapses present at the end of the axon. This chemical substance, known as the neurotransmitter, is transferred to the dendrite of another nerve cell and the signals are transmitted.