Bug Quest: Collect corpses of spiders and give them to Arinas, the entomologist. Medium pulsating spiders (size of a tropical bird spider) bring 20 gold apiece. Large pulsating spiders (size of a small dog) bring 50 gold apiece. Huge pulsating spiders (little bigger than a full-grown Earth human) bring 200 gold apiece. The guardian spider brought 500 gold (use shield to fight him).

You can't sell the corpse of Lachesis, but offer it up to your divine for plenty of essence! You can give spider corpses to whatsherface in the Darkenwood, the arachnoi queen. She'll pay you less than Arinas but if he's dead its better than nothing right? Give and run, she attacks while she's paying. All the spiders including the azdun spiders are worth only 10 gold apiece when given to the Queen. *gag*

Mushroom Quest: Get mushrooms from Ophidian caves and feed them to Arinas’ beetle.

Stirge Egg Quest: Collect the stirge eggs and bring them to Skt'all, the Ophidian Chieftan. He will pay you 75 gold for each egg. Careful, the Ophidian's are aggressive!

Butterfly Quest: Arinas collects dead butterflies (most of you know this)... I think it's the same amount of gold per dead butterfly but it's better than nothing... and sometimes it's even easier... imagine a room full of 100 butterflies... and you have tekura... 

Also learn about the Maiden Quest and Ornithologist Quest in Great Rock!