title: How do I combine COUNTIF with OR
body: <p>In Google Spreadsheets, I need to use the <code>COUNTIF</code> function on a range with multiple criteria.  So in the table below, I would need to have something like <code>=COUNTIF(B:B,"Mammal"or"Bird")</code> and return a value of 4.</p>
  
  <pre><code>A         |B
  -------------------
  Animal    | Type
  -------------------
  Dog       | Mammal
  Cat       | Mammal
  Lizard    | Reptile
  Snake     | Reptile
  Alligator | Reptile
  Dove      | Bird
  Chicken   | Bird
  </code></pre>
  
  <p>I've tried a lot of different approaches with no luck.</p>