Why animals which do not take care of their young produce many eggs?
The large number is to compensate for the poor probability of survival. This is most common in short-lived animals, such as insects, that cannot take care of their young. (R stands for reproductive rate, which such animals try to maximize.)
Why do some animals produce more eggs?
The reason that some animals lay eggs is because that is more beneficial to them than than it is to give birth to a live offspring. Millions of years ago, every animal laid eggs, and slowly, they evolved to give birth to live babies based on what would help them survive best.
Why do some animals lay a lot of eggs at one time while others only lay a few at a time?
Clutch size in birds and reptiles has long been studied by biologists, who have found generally that species that are short-lived or have a low survival rate among their offspring tend to lay more eggs at one time to increase the chances of having surviving offspring.
Which is the largest egg in the world?
ostrich
The largest egg on record weighed 2.589 kg (5 lb 11.36 oz) and was laid by an ostrich (Struthio camelus) at a farm owned by Kerstin and Gunnar Sahlin (Sweden) in Borlänge, Sweden, on 17 May 2008.
Are there any animals that do not incubate their eggs?
Most birds receive parental care ( March of the Penguins, anyone ?), but megapodes —a group of chicken-like birds native to eastern Australia, New Guinea, Indonesia, and the Philippines—are a big exception. These birds “do not even directly incubate their eggs,” Roby says.
How to talk about animals that hatch from eggs?
Tell the children that they will be investigating eggshells and talking about animals that hatch from eggs. Ask the children what they think the egg’s job is. Display the pictures of the animals that hatch from eggs, and discuss the fact that not all eggs have hard shells. For instance, fish eggs and frog eggs are soft.
Which is the only animal that lays eggs?
Birds and fish are not the only animals that lay eggs. Insects, turtles, lizards, and reptiles lay eggs, too. Only two mammals lay eggs: the platypus and the echidna.
Is it illegal to take an egg from a wild bird?
Follow these steps if you find a wild bird egg that looks abandoned. Leave the egg alone if possible. In many places, it’s illegal to remove bird eggs from their natural habitat. In the U.S., for example, according to the Migratory Bird Treaty Act of 1918, it is illegal to take or possess any part, nest, or egg of a wild bird species.
Tell the children that they will be investigating eggshells and talking about animals that hatch from eggs. Ask the children what they think the egg’s job is. Display the pictures of the animals that hatch from eggs, and discuss the fact that not all eggs have hard shells. For instance, fish eggs and frog eggs are soft.
Most birds receive parental care ( March of the Penguins, anyone ?), but megapodes —a group of chicken-like birds native to eastern Australia, New Guinea, Indonesia, and the Philippines—are a big exception. These birds “do not even directly incubate their eggs,” Roby says.
Birds and fish are not the only animals that lay eggs. Insects, turtles, lizards, and reptiles lay eggs, too. Only two mammals lay eggs: the platypus and the echidna.
How to teach students about animals and offspring?
Tell students that animals take care of their babies just like parents or guardians take care of their children. Show students images of a duck and duckling, a chicken and a chick, a cow and a calf, and a whale and its calf. Pair the images together. Read Animal Babies by Eric Carle. Direct the students to imitate the sounds that the animals make.
