Nardo was yelling at something last night.
Usually, that means an interloper is on the patio or his sidewalk.
I opened the door and escorted Nardo back inside.
The target of his rage was an orange cat with white markings.
I slowly followed this cat, saying "Hi, Kitty" and "Hello there" and "Who's a good cat?" enough to convince the cat I wasn't going to hurt it.
When I said "Hi, Tango" the cat flopped on the ground and rolled around happily, meowing.
Yup. I thought I recognized that cat.
And now I know why Nardo didn't yell until the cat was up close. Nardo and Tango met a long time ago, Nardo escorting Tango inside as a friend.
Until, of course, Nardo realized he didn't like interlopers.
Go figure.