Do Thunderbirds Exist?
Do Thunderbirds Exist? Do Thunderbirds exist? Thunderbirds are typically seen right before a severe thunderstorm, most often in the spring and summer months. Thunderbirds are described as being incredibly large with tremendous wingspans. They blot out the sun when they fly overhead. Are the Thunderbirds extinct? Dromornithids Temporal range: Oligocene – Pleistocene, Family: †Dromornithidae Fürbringer,