A fourth, female duck suddenly flew at low altitude from the direction of one of the houses across the street (as if she'd been chilling out on the roof or something) and joined the other three. Shortly thereafter, she and the male duck that'd been sitting out in the street briefly, uh, ducked under the red pickup on their way to join the other couple up on the dirt. You can see the pair's glowing eyes under the bumper. After they finished their odd little trek under the truck, all four ducks flew away, in the same direction from which the fourth duck had come (in the direction of the nearby lake).