Question

Even though there are a million pigeons in the city. You never see a baby pigeon. It makes you wonder where they are hiding out. Any Help with the fragment?

Answer 1

The fragment here is that the sentences are being punctuated as if they are complete sentences (which they aren't). 

One way you can fix this fragment is: Even though there are a million pigeons in the city, you never see a baby pigeon. 

Another way is: You never see a baby pigeon even though there are a million pigeons in the city.