
It's about oneandonetenth times as heavy as a Hippopotamus.
In other words, 261 slugs is 1.02 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.98 times that amount.
(Hippopotamus amphibius) (adult, male)
It's about oneandtwofifths times as heavy as The Tongue of a Blue Whale.
In other words, the weight of The Tongue of a Blue Whale is 0.71 times 261 slugs.
(Balaenoptera musculus) (adult)
It's about oneandahalf times as heavy as a Giraffe.
In other words, the weight of a Giraffe is 0.67 times 261 slugs.
(Giraffa camelopardalis reticulata) (adult, male)An adult, male giraffe weighs an average of 170 slugs. 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 threefifths as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 1.7 times 261 slugs.
(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. TRex) (estimated live weight)
It's about oneandfourfifths times as heavy as a Rhinoceros.
In other words, the weight of a Rhinoceros is 0.56 times 261 slugs.
(for Black rhinoceros, Diceros bicornis) (Adult, male)
It's about half as heavy as an Elephant.
In other words, 261 slugs is 0.5069 times the weight of an Elephant, and the weight of an Elephant is 1.973 times that amount.
(for African bush elephant, Loxodonta africana) (Adult, bull)
It's about twoandahalf times as heavy as a Car.
In other words, 261 slugs is 2.306 times the weight of a Car, and the weight of a Car is 0.4337 times that amount.
(for 2009 Ford Taurus; automatic transmission; curb weight) 
