passenger pigeon

Passenger Pigeon, it was once of all birds without a doubt the most common. Well, now they are all gone. Extinction is forever and ever. There use to be billions of them in huge migratory flocks and never a bird so numerous. It seems like a fairy tale now. Hey, there are even stories of entire trees toppled due to the weight of a flock of passenger pigeons. It is hard to believe they are all gone now.