RH Tawney's self-satisfied bullfrog sat on the bank and croaked to the tadpoles in the pond that they had only themselves to blame for not evolving into a superior species.
As a result of these investigations, inner-ear potentials and electrodermal responses in the bullfrog have been recorded over a range from 100 to 3,500 hertz.
In a plate-sized depression often at the crest of a rocky knoll, the male inflates his chest like a bloated bullfrog, heaves his thorax, bobs his head, and releases a resonant boom like the sound made by blowing across the top of a large bottle.
In the northern part of its range in North America, the tadpoles of the bullfrog L. catesbeianus require three years to undergo their development.
They made new compounds, such as backwoods and bullfrog, and gave new meanings to such words as lumber (which in British English denotes disused furniture, or junk) and corn (which in British English signifies any grain, especially wheat) to mean "maize".
More than 10,000 eggs have been estimated in one clutch of the North American bullfrog, L. catesbeianus.
On one unforgettable evening on a relatively horizontal walk through the glaciated U-shaped valley of Moraine Park, I found myself alone with a grazing moose, a family of playful chipmunks, a sleepy snowshoe hare in its summer colours and an operatic bullfrog singing his monotonous refrain with repetitive gusto as hummingbirds trilled falsetto overhead.
By the age of 16 – having already completed his A-levels – Hassabis began working at games company Bullfrog and co-wrote the successful game Theme Park – which was based on an amusement park and released in 1994 - in his year off before going to the University of Cambridge.
These may have been introduced with the release of the North American bullfrog.
The different sized eardrums in the American bullfrog (Lithobates catesbeianus) are examples of hypermorphism in male bullfrogs.
We were at Gretchen's house, in Raleigh, and she started the day by feeding her bullfrog, who was around the same size as her iron and was named Pappy.
