Analysis of information sources in references of the Wikipedia article "Kosher locust" in English language version.
The kinds of grasshoppers permitted by the Torah are eight, which are these: ... Anyone who is knowledgeable regarding them and their names, he eats [them]; and the hunter is faithful concerning them, just as he would be concerning a [clean] fowl. But he that is not knowledgeable, he checks their signs; there being three distinct signs common to them: all having four forelegs, and four wings which cover most of their body lengthwise and most of their body's broadside, and having two hind femurs for jumping withal, lo, such is an edible (lit. pure) kind [of insect]. And even if its head was long, and it had a tail, if its name is a grasshopper, it is edible (lit. pure).
As for eating grasshoppers, the Jews of Yemen did not follow the halakhic ruling of Maimonides, where he posited that it was sufficient to merely recognize their features. Instead, they ate only the kind of grasshopper that, according to their tradition, was an edible grasshopper, namely, the desert locust (Schistocerca gregaria), and which they called in Yemenite-Jewish parlance, ğarād. Rabbi Abraham Ṣanʻāni's responsum indicates that even in his realm the practice was as the other communities in Yemen, although he personally refrained from eating them, probably because of the impact of Rabbi Ḥaim ben Attar's opinion.OCLC 1041776317.
Locusts: Although the locust (ğarād) was not a regular component in the Yemenite cuisine, it is worthy of being mentioned here. This is the only insect where some of its species are permitted to be eaten under Jewish biblical law (Leviticus 11:22). The Jews of Yemen would occasionally eat of it, while those with refined taste saw it as a delicacy. The locusts were gathered in the hours of the night, at the time when they attacked agricultural areas, and their crispy bodies were prepared for eating either by frying or roasting. Children were also treated with them, as a delicacyOCLC 233096195
