Olympiad Test Level 1: Birds and Common Insects Class 3 Science MCQs

Ostriches and Kiwis are flightless birds because they have small wings that can't help them fly. Instead, they are good at running or hopping around.
Sparrows, pigeons, owls, and woodpeckers can all fly.
So, the correct option is: D - Ostrich and Kiwi

Birds have feathers on their bodies to keep them warm and help them fly.
They also have thin, light, and hollow bones which make it easier for them to fly.
Birds do not have forelimbs that turn into fur; instead, their forelimbs become wings for flying.
So, the correct Answer is; Option C - (i) and (iii)

The larva of a housefly is called a maggot. It is a small, white, worm-like creature that comes out of the egg laid by the adult fly.
A caterpillar is the larva of a butterfly, and a pupa is the stage where the larva changes into an adult.
So, the correct Answer is - Option B.- Maggot

When many insects like bees or flies gather and fly together, we call it a "swarm." "Flocks" is used for birds, and "crowd" is for people, not insects.
So, the correct Answer is Option A - Swarm

A duck is an "aquatic" animal, which means it lives in water. It uses its "beak" to probe for insects in the sand and mud.
Ducks are great at swimming and looking for food in wet places.
So, the correct Answer is Option C - Aquatic and beak

Hawks and eagles are "carnivores," which means they eat other animals.
They hunt small animals like rabbits, fish, or birds to feed themselves.
They do not eat plants or leftover food like scavengers.
So, the correct Answer is - Option B - Carnivores

In winter, the climatic conditions of Siberia are not suitable for birds living in these areas.
Siberian Cranes have the longest migratory period, so they are called migratory birds.

The unscrambled word is "Humming." The smallest bird in the world is the "Hummingbird." It is tiny and can hover in place by rapidly flapping its wings.
So, the correct Answer is Option C - MMUGNIH 

Insects breathe through a complex network of tubules called the tracheae.
Large tracheae connect to spiracles opening at the surface of the body, where air enters and carbon dioxide exits.
So, the correct answer is Option D - Tracheae

• The insect with a sucking feeding habit is the housefly.
• Houseflies use a specialised mouthpart for sucking liquids.
• This adaptation allows them to feed on liquid substances.

• Ants and termites are crawling insects.
• They do not have the ability to fly.

Ducks have "broad and flat beaks." This type of beak helps them scoop up food from water, like plants and small insects.
It is perfect for their way of feeding, as they can filter food from the mud and water.
So, the correct Answer is Option D - Broad and flat beaks

(i) True – Birds have hollow bones, which are light and help them fly easily.
(ii) True – A Kiwi is a flightless bird because it cannot fly.
(iii) False – Eagles are carnivores; they eat other animals, not plants.
(iv) False – Ducks have broad and flat beaks, not pointed beaks.
So, the correct Answer is Option D - TTFF

Insects are the most diverse and largest group of animals on Earth.

nsects have six legs, also referred to as three pairs of jointed legs, all attached to their thorax. This six-legged body plan is a defining characteristic of insects, placing them in a group called hexapods, which means "six-footed".  

Woodpeckers have two toes painting forward and two backward.
Perching birds have independent and flexible toes.
Wading birds have long toes and water birds have webbed feet.
So, the correct Answer is Option A - (i)-c, (ii)-d, (iii) - b, (iv)-a.

• The insect responsible for spreading malaria is the female Anopheles mosquito.
• These mosquitoes transmit the Plasmodium parasite, which causes malaria.
• Preventing bites from these mosquitoes is key to reducing malaria risk.

Bats are mammals because, like all mammals, they make milk for their young. Bats are not birds because they don't have feathers, they don't lay eggs, and are built very differently from birds.