Currently, the largest bird in the world is the Ostrich, but before the Ostrich there were even bigger birds like the Moa and the Elephant Bird. Unfortunately, these birds are extinct. The Moa became extinct in the 1800s, and the Elephant Bird (Aepyornis gracilis) became extinct in htye 1700s.
Goliath is the name of a giant. It would be fine as a name for a big bird.
With a giant bird.
Dyna Bird :p
The Roc is a mythical, giant bird.
The Giant Ibis is the national bird of Cambodia.
Yes, the Argentavis which was basically a bird had to be a giant so that it would be able to catch the horse.
It is a mammal
The panda is a mammal.
The Giant Moa.
The largest flightless bird in New Zealand was the Giant Moa (scientific name Dinornis maximus and Dinornis giganteus),
Big Bird
In television series Family Guy, there is a giant chicken known as the Big Chicken.