Nadine had reached for the tendril of green, and had noted that it pulled away. Moving further from the two women as their conversation centered around it. Almost as if it knew, or maybe felt the vibe of examination. She had seen Hannah pull her space gun just in case, but Nadine didn't think it was needed. Naively, of course, she reached further still, nearly chasing the tendril. Fully expecting it to pull from the earth with a clod of dirt dangling from twisted and tangled roots, the sight that appeared was no less than a shock to her. The grass-like receptor didn't feel like grass at all. In fact, it felt alive for lack of a better word. The second that the creature was grabbed, a wail erupted. Like that of a high-pitched white noise. One that debilitated, and induced great confusion in the recipients of such a wave of sound.
Nadine's eyes grew wide when the head of the creature was exposed, and the dirt fell away from its features. In shock at what she held in her hand, she wasn't entirely sure what to do. The wail was painfully discomforting, and the longer she held the thing, the louder the volume and pain increased. Leather-like skin, deep chocolate brown in color with earthy tones everywhere else save for the vibrant green of its antennae. Even the creature's eyes weren't something they had ever seen before. Pitch black in totality, it lacked the ivory whites of a 'normal' earth eye. The scream continued to increase, and Nadine could barely hear the sound of Hannah's voice begging her to drop the creature. The noise caused a massive headache like sensation, and Nadine squinted her lids, recoiling her head back at the offensive sound waves.
It quickly accelerated to the point that Nadine could take it no longer, and she abruptly dropped the creature. Releasing it's antennae with utter annoyance at the way it screeched so. Hands then went to either side of her head, cupping her ears in attempts to protect from whatever damage was ensued by such a high-voltage whine. Though, by now it was probably too late, if any damage had been done. Through all of this, Nadine hadn't seen, nor noticed David running toward them, and it was only once she dropped the alien that she turned away from it-- and only then noticed him dropped to the ground, covering his ears (eyes?). However, she couldn't make out anything that was being said. Everything was muffled at best.
"What is that!?!?"
She screamed, trying to hear herself. It felt as though her efforts to speak only amounted to the sound of a normal spoken person-- even when she screamed.. And to speak on the normal level, it felt as though a whisper... Or a thought in the head given no voice.
Backing away from the site that she had dropped the alien, she watched it burrow itself back into the ground, and steer away from them, but only a short distance before the receptacles sunk into the earth, and disappeared as well, leaving no sign as to where it was, or where it had gone. A feeling of dread quickly hit the pit of her stomach. They had to survive not only a new planet, but possibly a new predator. They may be prey, and not even know it.
((Not sure what you had in mind for the creatures, Josie. Hope what I added is correct to your interpretations.. If not, I can edit it out. :) ))