Sparrows, also, are very amorous birds; on which account Terpsicles says, that those who eat sparrows are rendered exceedingly prone to amorous indulgences; and perhaps it is from such an idea that Sappho represents Venus as being drawn by sparrows yoked in her chariot; for they are very amorous birds, and very prolific. The sparrow has about eight young ones at one hatching, according to the statement of Aristotle. And Alexander the Myndian says that there are two kinds of sparrows, the one a tame species, and the other a wild one; and he adds that the hen-sparrow is weaker in other respects, and also that their beaks are of a more horny colour, and that their faces are not very white, nor very black; but Aristotle says that the cock-sparrow never appears in the winter, but that the hen-sparrows remain, drawing his conclusions as to what he thinks probable from their colour; for their colour changes, as the colour of blackbirds and of coots does, who get whiter at certain seasons. But the people of Elis call sparrows δείρηται, as Nicander the Colophonian tells us in the third book of his treatise on Different Dialects. 47. We must also speak of the quail; they are called ὄρτυγες. And here there arises a general question about words ending in υξ, why the words with this termination do not all have the same letter as the characteristic of the genitive case. I allude to ὄρτυξ and ὄνυξ. For the masculine simple nouns ending in ξ when the vowel υ precedes ξ, and when the last syllable begins with any one of the immutable consonants or those which are characteristic of the first[32] conjugation of barytone verbs, make the genitive with κ; as κῆρυξ κήρυκος, πέλυξ πέλυκος, Ἔρυξ ἔρυκος, Βέβρυξ, Βέβρυκος; but those which have not this characteristic make the genitive with a γ, as ὄρτυξ ὄρτυγος, κόκκυξ κόκκυγος, ὄρυξ ὄρυγος; and there is one word with a peculiar inflexion, ὄνυξ ὄνυχος; and as a general rule, in the nominative case plural, they follow the genitive case singular in having the same characteristic of the last syllable. And the case is the same if the last syllable does not begin with a consonant at all.