Shalebridge

Shalebridge this location on the map consist of Broken relay tower, Shalebridge Tunnels and Shalebridge Hills. The latter two are rival ant colonies.

Shalebridge Tunnels
Shalebridge Tunnels is a small cave system that is home to a small, friendly mutated ant colony. The entrance is to the north from the broken relay station located just below the hill and resembles a circular plate or cover surrounded by glowing mushrooms.

When the player enters, the smaller, friendly ants are under attack from larger, more aggressive ants. The larger ants will attack the player and can be killed to protect the colony. The larger ants will not be here if you have already killed the queen in Shalebridge Hill.

There is a dead Ant Researcher in a pool of water near the eggs that has a Big Book of Science on the corpse.

If you inspect a nearby ant eggs sack, the option to inject a stimpak is given. There is an Ant Compost Heap with some Ant Nectar in it and it will replenish faster upon killing Ant Queen in Shalebridge Hill.

If you kill, and then search, one of the larger ants you will get this message:


 * It appears that these ants are from another ant colony. Perhaps attacking this rival colony would help the forager ants survive.

Shalebridge Hill
This colony is just north of Shalebridge Tunnels. There is not much here except Ant Workers, Ant Soldiers and an Ant Queen. An interesting way to get rid of her is to try remain as high as possible and cripple her antennae, causing her to frenzy. She will start attacking her former fellow ants who have numbers on their side, so she will get swarmed and die. A flamer will also work quite well.

Bug

 * The Queen Lair has only minor loot, 10mm Pistol, 10mm ammo, shotgun shells and 5.56mm ammo. The 5.56mm ammo is bugged however so don't try to pick it up or you will experience critical error. (No visible error seen when picking it up in the PS3 version.) A Scoped .44 Magnum with ammo can be found near a rotting Brahmin corpse.
 * In the PS3 version, the NPC, Cross, won't follow you into either the tunnel nor the hill. However, she will suddenly appear inside after you travel in a ways and have no problems following you after that. The NPC, Fawkes, also displays this behavior, which puts forth the possibility that any of the humanoid PCs will behave in this manner as well (Charon should follow you just fine).
 * There is also Mentats, Metal Armour and a Jet in a pile of bones, through the tunnel on the right as you enter the Invaders/Queens Lair. (You have to jump over the rock to get through the tunnel)

Loot outside cave

 * Quite a bit to the east of Shalebridge Tunnel entrance there is an ant egg clutch (it is on the other side of the rocky hill) with a copy of D.C. Journal of Internal Medicine.