It's about as heavy as The Tongue of a Blue Whale
(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 6,000 pounds. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about one-and-three-tenths times as heavy as a Rhinoceros
In other words, 6,000 pounds is 1.3 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 0.77 times that amount.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 4,600 pounds. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about seven-tenths as heavy as a Hippopotamus
In other words, 6,000 pounds is 0.72 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 1.4 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 8,300 pounds. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about one-and-two-fifths times as heavy as a Giraffe
In other words, 6,000 pounds is 1.41 times the weight of a Giraffe, and the weight of a Giraffe is 0.709 times that amount.(Giraffa camelopardalis reticulata) (adult, male, maximum of range)
An adult, male giraffe can weigh up to 4,250 pounds. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day.
It's about one-and-two-thirds times as heavy as a Car
It's about half as heavy as an Elephant
In other words, 6,000 pounds is 0.45 times the weight of an Elephant, and the weight of an Elephant is 2.2 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 13,000 pounds. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 8,800 pounds
It's about two-fifths as heavy as a Tyrannosaurus rex
In other words, 6,000 pounds is 0.43 times the weight of a Tyrannosaurus rex, and the weight of a Tyrannosaurus rex is 2.3 times that amount.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 14,000 pounds while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.