I cranked the neurachem vision, and scanned the colony. Dark shapes preened and flapped here and there on protruding crags in the mass of white, but there weren’t many of them. Ripwings, Natsume assured us, don’t spend a lot of time at the nests. No eggs to keep warm, and the embryos feed directly off the webbing. Like most hardcore climbers, he was a part-time expert on the creatures. You’re going to get a few sentinels, the odd birthing female and maybe some well-fed parents secreting more gunge onto their particular patch. If you go carefully, they may leave you alone.

I grimaced again, and began to work my way up the crack. The oily stink intensified, and shreds of torn webbing began to adhere to my suit. The chameleochrome system blanched to match wherever the stuff touched. I stopped breathing through my nose. A quick glance down past my boots showed me the others following, faces contorted with the smell.

And then, inevitably, the crack ran out and the display said that the next set of holds were buried beneath the webbing. I nodded drearily to myself and plunged a hand into the mess, wriggling fingers around until they found a spur of rock that resembled the red model in the display. It seemed pretty solid. A second plunge into the webbing gave me another, even better hold and I hacked sideways with one foot, looking for a ledge that was also covered in the stuff. Now, even breathing through my mouth, I could taste the oil at the back of my throat.

This was far worse than the climb over the bulge. The holds were good, but each time you had to force your hand or foot through the thick, clinging webs until it was secure. You had to watch out for the vague shadows of embryos hung up inside the stuff, because even embryonic they could bite, and the surge of fear hormones they’d release through the webbing if you touched them would hit the air like a chemical siren. The sentinels would be on us seconds after, and I didn’t rate our chances of fighting them off without falling.

Stick your hand in. Flex it about.

Get a grip. Move.

Pull clear and shake your hand free. Gag at the liberated stink. Stick your hand back in.

By now we were coated with clinging strands of the stuff and I was finding it hard to remember what climbing on clean rock had been like. At the edges of a nearly cleared patch, I passed a dead and rotting hatchling, caught upside down by the talons in a freak knot of webbing it hadn’t been strong enough to break before it starved to death. It added new, sickly sweet layers of decay to the stink. Higher up, a nearly-grown embryo seemed to turn its beaked head to look at me as I reached gingerly into the gunge half a metre away.