A blessing in disguise that my last save and quit won't load. I do have a manual save when new seasons kick in.
So Day 1 Summer in my Terrifying Glacier, 1-pick + anvil, self-challenge.
Cavern was breached, pastured the 2 wagon animals, some booze and food made.
My earlier facepalm of setting down a cage instead of cage trap is corrected.
Nothing in the caverns according to the u screen.
So, gave 4 of my 7 mechanic to expedite cage traps. Miner removed ramps to increase traffic to trapped choke points.
Migrants! 3 adults + 1 kid + 1 yak calf. Undead Yeti on surface is a bit far away, unlocked hatch and let them in.
Hurray! An idea formed to use yak calf pastured as bait for my cagetraps, outside the fort proper.
Uh oh, Troll (Deceased) in the u screen. Some time later, GCS is on radar!
Checked Inside burrow, to add my Trader Depot on z-1.
Added Outside burrow to access pastures and yak calf trap some z+3 above my cavern entrance.
GCS is near, but disappeared in radar. I was following it, but it went out of range.
Then I see battle report, GCS fighting the yak calf! Burrow Inside only! Too late, GCS injected venom on the calf.
Sigh, ok, pasture Two-Humped Camel on 1 tile outside cavern hatch, surely to attack GCS into 1-tile path of cage traps.
/facepalm. This time I Follow GCS, and well it's a spider, duh, climbing and moving z+8 above. Jumping and moving between tree tops and walls.
It can easily skip my ramp choke points on the ground.
Ahh, but it sensed my camel bait. It actually swung around from the SW to the far east, swam down 3 tiles of 7/7 water onto my NW flank.
Good thing I have a cage traps in those 1 tile choke points, and captured a CGS before Autumn.