Let's explore the relationship between "locusts" and "earth grasshoppers".
Locusts, also known as "grasshoppers," are insects of the Orthoptera order and the Short winged Grasshopper family. They mainly feed on the leaves of grasses and can cause serious crop disasters in a short period of time, especially in dry years. Locusts are distributed worldwide and have a wide variety of species.
When we mention 'earth grasshoppers', it is more of a colloquial or regional term. In most cases, 'earth grasshoppers' actually refer to a species or a class of insects similar to locusts. In different places, 'earth grasshopper' may refer to different insect species, but in most cases, it shares significant similarities in biological characteristics and habits with locusts.
Furthermore, if we understand the word 'grasshopper' broadly, it can indeed be used to refer to various similar insects, including locusts. In some places, people may habitually use "earth grasshoppers" to specifically refer to insects that live near soil and have a morphology similar to locusts.
Although 'earth grasshopper' is not a strict scientific classification name, in most cases, when people mention 'earth grasshopper', they are actually referring to locusts or insects similar to locusts. It can be considered that locusts can be referred to as "earth grasshoppers" to some extent, although this name may vary depending on the region and customs.
So, the answer to this question is: locusts can be seen as earth grasshoppers in certain contexts or colloquialisms.