Is it the screeching of birds of prey or could it be something else?
The wild bird sounds can be heard echoing through parts of downtown, and many are baffled.
ABC-7 was at the intersection of Campbell and Florence streets where the reports have been running rampant.
Some people claim seeing a Monstrous bird, up to 10 feet in width.
Others say it's not of this world.
"I was really scared because I didn't know what it was. I was like, 'a UFO?'" said one downtown jogger.
"I saw it," said Brian Limon.
"I was running down here," a jogger told ABC-7.
"10 feet long," said Limon.
"And it flew over here. It was crazy," Limon continued.
"Fire out of its eyes," the jogger told ABC-7 with fear.
"All of a sudden I heard this bird, like, caww!" said a 12th-grader from a nearby school.
"Call the goverment or something," said the jogger.
But even government officials were baffled.
Claims of birds of prey reported near a bus stop.
An ABC-7 photographer on the scene to captured the sounds.
ABC-7 investigated and we found the culprit.
"As you can hear in the backround, Sun Metro installed a device," said Sun Metro spokesperson Laura Cruz Acosta.
She tells ABC-7 the transit system was having a bus-stop pigeon problem.
"We would have the ground and the benches and the area around where passengers wait covered in pigeon feces," said Cruz.
So they set up a sound system that would prevent the build-up of pigeon poop.
"What you hear are different monkey sounds, different birds of prey sounds that the pigeons are actually afraid of," said Cruz.
Cruz tells ABC-7 the audio playback is drastically improving the condition of the benches and the surrounding areas.