In Australia the Lyre bird is on the 10c coin.
There are various animals depicted on 10c coins. It would depend on the country you are referring to.
In a 2 dollar coin there are 20 10c coins in it
snake
The Superb Lyrebird is on the Australian 10c coin because it is particularly unique to Australia.
Because Maoris are chasing a 10c coin
A torch signifying Liberty, with an olive branch on the left signifying Peace, and an oak branch on the right, signifying Strength and Independence. Given that this question is in the "Australian birds" category, it is assumed that the question refers to an Australian 10c coin. On the back of the 10c coin is the unique Australian bird known as the Superb Lyrebird. It is known for its amazing ability to mimic a huge variety of sounds.
The Lydian's main contribution is that they invented the first coin.
10c-4c = 6
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lydians
The Lydians invented the coin around 500 BC