This Broad-headed Bug nymph was carrying prey—the yellowish ovoid—around for some time. My best guess is that it was a small pupa, but the photos don’t tell much. It’s possible that the bug had different items in different photos, but as far as we can tell, it carried only one around. The nymph itself was about 10 mm long.
At times, the nymph stood still and moved its abdomen back and forth and waved one hind leg. Given the two big, black spots, we thought it looked like it was mimicking an ant, with the leg mimicking an antenna. (Video, thumbnail 6.)
Broad-headed bug nymphs often resemble ants.
Watching this whole scene, and following the bug warily, was a female Habronattus americanus jumping spider. She never approached the bug, though she kept it in view for several minutes.