Coyotes barking Saturday night

At 10pm we were in our house and heard barking in the distance. Could it be coyotes, we wondered? We were not sure. The howling continued off and on for 50 minutes, so we had to go out and investigate. Was it a dog in a yard or a coyote? We grabbed a flashlight and followed the barking towards the greenbelt behind our house in Northpark. We climbed the hillside of the greenbelt and saw no dogs in the fenced yards below us. The barking was louder now and definitely coming from the woods. As we stopped and listened, we could hear a coyote barking in the distance and then the coyote in our greenbelt communicated back with a howl. We flashed the light into the woods but did not see the coyote. I read that in the Northwest it is mostly the moms and pups that communicate when separated. We stayed awhile and listened to the coyotes bark-howling back and forth until eventually, the one in our greenbelt fell silent. It was the first time we heard coyotes bark-howl so close to our house. Just a reminder to keep cats and small dogs indoors, especially from dusk until dawn. Coyotes are out hunting in our neighborhoods.