Да, это же юмористическая песня-мультфильм. По поводу перевода — русская художественная адаптация вряд ли существует. Но можешь грубо с помощью электронного переводчика:
They used to walk. They used to swim.
They used to fly with a toothy grin.
Some ate plants and some ate meat.
Some walked around on just two feet.
Oh, the dinosaurs! Big as trees!
The dinosaurs! Brains like peas!
Jaws and claws and teeth and bone...
that used to growl and groan and moan.
Some had feathers. Some had scales.
Spikes clubs and whip-like tails.
They fought like dragons. The earth sure shock.
The volcanos sizzled and the lava coocked.
Oh, the dinosaurs! Big as trees!
The dinosaurs! Brains like peas!
Jaws and claws and teeth and bone...
that used to growl and groan and moan.
Tyrannosaurus Rex was a terrible king.
The Stegosaurus' tail could really swing.
Brachiosaurus liked to stomp.
Trachodon would chew and chomp.
Oh, the dinosaurs! Big as trees!
The dinosaurs! Brains like peas!
Jaws and claws and teeth and bone...
that used to growl and groan and moan.
They roamed the earth for a hundred million years...
without worries, ares or fears.
Then one day they hit the soil...
now they're fossils, gas and oil!
Oh, the dinosaurs! Big as trees!
The dinosaurs! Brains like peas!
Jaws and claws and teeth and bone...
that used to growl and groan and moan.
