Paradoxographus Vaticanus 2
2 “Daliôn says in the first book of his Ethiopian Matters that there is an animal in Ethiopia called a krokotta. When that creature goes near backyards it hears people chattering, and especially the words/names of children. But when it goes out at night, it speaks words/names and the children who come out are devoured by it”
Δαλίων φησίν, ἐν τῇ πρώτῃ τῶν Αἰθιοπικῶν ἐν τῇ Αἰθιοπίᾳ θηρίον γίνεσθαι κροκότταν καλούμενον· τοῦτο ἐρχόμενον πρὸς τὰς ἐπαύλεις κατακούειν τῶν λαλουμένων, καὶ μάλιστα τὰ ὀνόματα τῶν παιδίων. νυκτὸς δὲ ἐρχόμενον λαλεῖ τὰ ὀνόματα καὶ ἐξερχόμενα τὰ παιδία καταβιβρώσκονται ὑπ’ αὐτοῦ.
Photios adds the following horror:
“[We should note the fact that] there is a creature in Ethiopia which is named krokottas which is like a combination of wolf and a dog, but it is more savage than both and is heavier in its face and at the end of its feet. It is also amazing for its boldness, and it is extremely capable compared to the rest in its teeth and its belly. For they also tear to pieces easily every type of bone and whatever they take up is consumed easily and their digestion is indescribable. In addition, while some of them have been described as imitating human language, we don’t believe it. Nevertheless, some have added that they call out people by name at night—and that they try to use a human voice in doing this—and then they gobble up whoever comes out as they fall upon them.”
῞Οτι ὁ κατὰ τὴν Αἰθιοπίαν ὀνομαζόμενος κροκόττας ἐστὶ μὲν ὡς ἐκ λύκου καὶ κυνὸς σύνθετον, ἀμφοῖν δὲ ἀγριώτερον καὶ πολλῷ βαρύτερον ἀπό τε τοῦ προσώπου καὶ τῶν ἄκρων ποδῶν, ἀλκῇ δὲ θαυμαστόν, ὀδοῦσι δὲ καὶ κοιλίᾳ δυνατώτατον τῶν ἄλλων. Καὶ γὰρ κατάγνυσιν εὐπόρως πᾶν ὀστοῦ γένος, καὶ τὸ διαιρεθὲν εὐθέως δεδαπάνηται, καὶ περὶ τὰς πέψεις ἀδιήγητον. Τοῦτο δὲ καὶ μιμεῖσθαί τινες τὴν ἀνθρωπίνην διάλεκτον διηγούμενοι ἡμᾶς μὲν οὐ πείθουσιν· ἐκεῖνοι δὲ καὶ τοῦτο προστιθέασιν, ὡς καὶ ἐξ ὀνόματος κατὰ τὰς νύκτας καλοῦντες, τοὺς δὲ ὡς ἐπ’ ἀνθρώπου φωνῇ προσιόντας, οἱ δὲ ἀθρόον ἐπεισπίπτοντες κατεσθίουσιν.
The crocotta shows up elsewhere as well (Pliny, Aelian, etc).