# Storage

WORM in storage has 2 states: **On-chain** and **Off-chain.** 

<div><figure><img src="/files/cz38953EZXOa5aZWk0jF" alt=""><figcaption></figcaption></figure> <figure><img src="/files/uOXuilXWDUtdWD7JF1i4" alt=""><figcaption></figcaption></figure></div>

Worms from daily catches and preying rewards are Off-chain. You need to mint them to become WORM NFTs On-chain. WORM NFTs can be used to feed your Bird and can be listed or sold on the NFT marketplace (based on Sui Kiosk). \
\&#xNAN;*Note: If you don not mint your WORM NFT within 7days, it will be burned.*

**Mint WORM NFT fee:**\
Common: 0.005 SUI

Rare: 0.01 SUI

Epic: 0.015 SUI

Legends: 0.02 SUI

Mythic: 0.025 SUI

#### ⚠️ Attention ⚠️

This is the contract address for BIRDS WORM NFT: <https://suivision.xyz/package/0x356d0c33487d727fa31198d1ac9e082a5b57a89c6b56dd37fdf9d54db9d9f98d?tab=Transaction+Blocks> &#x20;

Please be cautious with other WORM NFTs, as they are not usable in the BIRDS game.

<figure><img src="/files/sqD8sQgUhiPMS7yUE6ni" alt="" width="375"><figcaption></figcaption></figure>

**How to list WORM NFT on the NFT Marketplace**

Click on the worm in On-chain tab that you want to list on the [Marketplace](/nft-marketplace.md), then enter the **price** and hit confirm. Now your item is listed on the marketplace.

<figure><img src="/files/yTdORCKf32cyPKErmgpO" alt="" width="375"><figcaption></figcaption></figure>

If you don't want to sell the worm, you can **Unlist** it.

<figure><img src="/files/PK7Sr26KjxhxY03RsxqP" alt="" width="375"><figcaption></figcaption></figure>


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