It was a blue ox.

那是一头蓝色的公牛。

youdao

Ox head is made by bamboo slips and paper, and its body by home-made blue cloth.

牛头是由竹条和纸做成的，牛的身体则是由自制的蓝色布料制成的。

youdao

In time, Paul and Babe the Blue Ox left Maine, and moved west to look for work in other forests.

VOA: special.2009.01.24

Paul always gave Babe the Blue Ox a 35 kilogram piece of sugar when he was good.

VOA: special.2009.01.24

Paul decided to keep the blue ox and named him Babe.

VOA: special.2009.01.24

Now if only we could find a big-blue-ox-sized inner tube...

BBC: Daily deal: Legendary family waterpark getaway