The rooster's crow: it saw an angel

Al-Bukhari relates in the chapter of the call to prayer that the rooster saw an angel and crowed, and the Prophet ﷺ mentioned this in connection with the adhan ¹ Bukhari 3303.

In this report, among the signs of prayer-time is what the rooster sees of the angels; it is among the proofs that among God's creatures are those who see what man does not see ¹.

Among the reports of creatures seeing the angels; this browser shows it in the angels section ¹.