τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars
roost on a perch: Ar. ἐπὶ ξυλοῦ καθεύδειν (Nubes 1431).
P. and V. καθῆσθαι, καθίζειν, Ar. and V. ἕζομαι; see settle.
perch upon: Ar. ἐφέζεσθαι (dat.).