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Bats versus Fish
Use the photos and facts to compare fish and bats. Then answer the questions below.

 
BAT FACTS   FISH FACTS
  1. Bats are found on every continent except Antarctica. Some live in caves while others “hang out” in hollow trees, under branches, or in people’s attics.
  2. Bats come in many different sizes. Some, such as the fruit-eating flying fox, have a wingspan of six feet. Others, such as the Hog-nosed bats of Thailand, are as small as your little finger, and weigh about as much as a dime.
  3. Bats are warm-blooded creatures: a group of animals that need to eat a lot of food every day in order to run the internal powerhouse that keeps their bodies warm regardless of the air temperature.
  4. Bats are social animals and many live in large groups called colonies. Some bat colonies include over 10 million individuals! There are also bats that live in small social groups of just a few animals.
 
  1. Fish were the first animals to have backbones. The first fish evolved about 500 million years ago.
  2. Oceans and lakes are home to more than 21,000 different kinds of fish — including sharks, goldfish, tuna, blowfish, clownfish, eels, stingrays, salmon, and trout. In fact, there are more fish species than all other vertebrate species combined.
  3. Fish use organs called gills to help them remove oxygen from the water. They have fins to help them move through the water.
  4. Fish are cold-blooded creatures. This means that their body temperature changes depending on the temperature of the surrounding water.

Answer the questions based on the evidence.

What’s one fact that makes you believe bats are fish?
What’s one fact that makes you believe bats are not fish?
Do you think bats belong in this group? Why or why not?
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