你可以用英文表达出这只鸟非常渴，可以使用短语 "this bird is very thirsty" 或 "the bird is extremely thirsty"。

这个表达来自英语中的形容词 "thirsty"，意思是渴的。形容词是一种修饰名词的词，用来描述名词的性质或特征。例如：

"I'm feepng thirsty. Can I have a glass of water?" (我感觉渴了，能给我来一杯水吗？)
"After running for miles, the marathon runners were all thirsty and exhausted." (跑了几英里后，马拉松跑步者都感到口渴和筋疲力尽。)

你也可以用中文表达出这只鸟非常渴，可以使用短语 "这只鸟非常渴" 或 "这只鸟极度渴"。例如：

"这只鸟非常渴，它一直在喝水。" (This bird is very thirsty and it's been drinking water nonstop.)
"这只鸟极度渴，我们必须立刻给它提供水。" (The bird is extremely thirsty and we need to give it water immediately.)