The slow-worm is in fact not a snake but a legless lizard.

蛇蜥其实不是蛇，而是无脚的蜥蜴。

He appeared to be herbivorous apart from the occasional agama lizard or worm when plant life was lacking.

他似乎是食草除了偶尔缺少植物时吃鬣蜥或蠕虫。