Here is the full list of all 23 Smalland: Survive the Wilds achievements.
Collect Firesand
Collect Icarus Wings
Meet with Malik
Meet with Sarnak
Collect a Snake Fang
Meet with Granger
Collect a Feather
Meet the Historian
Find the Witch, Tuhala
Meet the Merchant
Collect Pyrite
Find the key for the walnut chest
Collect bones
Collect silk
Collect stone
Glide for the first time
Collect a metal piece
Tame any creature
Meet with Nok
Claim a tree
Sleep in a bed
Collect chitin
Meet the Elder