According to Josephus what are on top of the Jewish Temple to prevent it from being defiled by birds?

Answer 1

A "kale-orev", raven-scarer. Sharp metal spikes with sharp points to prevent birds from sitting on the roof.

Answer 2

That kind of thing was implemented by Abraham, who tested God in all kinds of inane ways. Judaism existed pre-Abraham and would not put up spikes on the roof to keep away birds. A bucket of water (or rain) cleans up bird poop quite nicely from the roof of any temple

Answer 3

I believe that their were "spikes" so to speak that did not allow birds to land on top of the Temple.