本动画片改篇自英国著名作家朱莉娅·唐纳森（Julia Donaldson）及插画作家阿克塞尔·舍夫勒（Axel Scheffler）的同名作品《咕噜牛》 (The Gruffalo)。朱莉娅长期为儿童电视节目创作歌曲、编写剧本，目前已为孩子们创作了40多部童书和戏剧。

本片为BBC在2009圣诞节期间推出的节目之一。故事发生在幽深的大森林，主要讲述一只小老鼠智斗强大对手的故事。一开始画面的基调让人觉得恐惧。随着小老鼠的出场，画面色彩便鲜明起来，BGM 也让人觉得温馨，整个故事让人感觉轻松愉快。在节日期间与家中小朋友一起观看，不失为一种乐趣。

本片荣获2010年渥太华国际动画节－最佳儿童电视动画奖、2010年斯图加特国际动画节－最佳儿童动画奖。

The Gruffalo by Julia Donaldson

A mouse took a stroll through the deep dark wood.
A fox saw the mouse, and the mouse looked good.

"Where are you going to, little brown mouse?
Come and have lunch in my underground house."

"It's terribly kind of you, Fox, but no –
I'm going to have lunch with a gruffalo."

"A gruffalo? What's a gruffalo?"
"A gruffalo! Why, didn't you know?

He has terrible tusks, and terrible claws,
And terrible teeth in his terrible jaws."

"Where are you meeting him?"
"Here, by these rocks,
And his favourite food is roasted fox."

"Roasted fox! I'm off!" Fox said.
"Goodbye, little mouse," and away he sped.

"Silly old Fox! Doesn't he know,
There's no such thing as a gruffalo?"

On went the mouse through the deep dark wood.
An owl saw the mouse, and the mouse looked good.

"Where are you going to, little brown mouse?
Come and have tea in my treetop house."

"It's terribly kind of you, Owl, but no –
I'm going to have tea with a gruffalo."

"A gruffalo? What's a gruffalo?"
"A gruffalo! Why, didn't you know?

He has knobbly knees, and turned-out toes,
And a poisonous wart at the end of his nose."

"Where are you meeting him?"
"Here, by this stream,
And his favourite food is owl ice cream."

"Owl ice cream! Toowhit toowhoo!"
"Goodbye, little mouse," and away Owl flew.

"Silly old Owl! Doesn't he know,
There's no such thing as a gruffalo?"

On went the mouse through the deep dark wood.
A snake saw the mouse, and the mouse looked good.

"Where are you going to, little brown mouse?
Come for a feast in my logpile house."

"It's terribly kind of you, Snake, but no –
I'm having a feast with a gruffalo."

"A gruffalo? What's a gruffalo?"
"A gruffalo! Why, didn't you know?

His eyes are orange, his tongue is black,
He has purple prickles all over his back."

"Where are you meeting him?"
"Here, by this lake,
And his favourite food is scrambled snake."

"Scrambled snake! It's time I hid!"
"Goodbye, little mouse," and away Snake slid.

"Silly old Owl! Doesn't he know,
There's no such thing as a gruffal...?"

...OH!"

But who is this creature with terrible claws
And terrible teeth in his terrible jaws?
He has knobbly knees, and turned-out toes,
And a poisonous wart at the end of his nose.
His eyes are orange, his tongue is black,
He has purple prickles all over his back.

"Oh help! Oh no!
It's a gruffalo!"

"My favourite food!" the Gruffalo said.
"You'll taste good on a slice of bread!"

"Good?" said the mouse. "Don't call me good!
I'm the scariest creature in this wood.
Just walk behind me and soon you'll see,
Everyone is afraid of me."

"All right," said the Gruffalo, bursting with laughter.
"You go ahead and I'll follow after."

They walked and walked till the Gruffalo said,
"I hear a hiss in the leaves ahead."

"It's Snake," said the mouse. "Why, Snake, hello!"
Snake took one look at the Gruffalo.
"Oh crumbs!" he said, "Goodbye, little mouse!"
And off he slid to his logpile house.

"You see?" said the mouse. "I told you so."
"Amazing!" said the Gruffalo.

They walked some more till the Gruffalo said,
"I hear a hoot in the trees ahead."

"It's Owl," said the mouse. "Why, Owl, hello!"
Owl took one look at the Gruffalo.
"Oh dear!" he said, "Goodbye, little mouse!"
And off he flew to his treetop house.

"You see?" said the mouse. "I told you so."
"Astounding!" said the Gruffalo.

They walked some more till the Gruffalo said,
"I can hear feet on the path ahead."

"It's Fox," said the mouse. "Why, Fox, hello!"
Fox took one look at the Gruffalo.
"Oh help!" he said, "Goodbye, little mouse!"
And off he ran to his underground house.

"Well, Gruffalo," said the mouse. "You see?
Everyone is afraid of me!
But now my tummy's beginning to rumble.
My favourite food is – gruffalo crumble!"

"Gruffalo crumble!" the Gruffalo said,
And quick as the wind he turned and fled.

All was quiet in the deep dark wood.
The mouse found a nut and the nut was good.