DENVER -- A surge of wild turkeys along the South Platte and Poudre rivers in northeastern Colorado is beginning to cause a public nuisance.

The turkeys, known more as a holiday meal than for their intelligence, are out and about blocking traffic, invading front porches and challenging local authorities.

Early Wednesday morning, two turkeys stopped early-morning commuters along 5th Street in east Greeley, reported the Greeley Tribune.

In addition to blocking traffic, the wild birds are getting bolder, wandering into neighborhoods and knocking on doors.

Greeley animal control officers were recently called to a home in east Greeley because the resident reported a turkey was knocking on their door.

“We found out the turkey must have seen his reflection in the door glass, and thought it was another turkey and started pecking at it," Sgt. Susie West told the Tribune.

Animal control officers in Greeley say there is not much they can do about the birds.

“They're wild animals,” West said. “We can call the Department of Wildlife, but other than chase them away, we can't do anything.”

For those who are interested, fall turkey season opens on Sept. 1. But Greeley police Sgt. Joe Tymkowych was quick to note that it is illegal to hunt turkeys inside the Greeley city limits.