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Source: See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

###Install: Install from GitHub

Made some tweaks as follows:
June 01, 2019:

• Turned on styling for network-user pages.
• Fixed a race condition / GM_addStyle bug whereby the styles were not sticking for certain page loads.

November 16, 2018:

• Switched to proper SE image host because svgshare.com was crashing and "exceeding quota".
• Restored scripts to review paths, since they need duckies too.
• Moved the script to GitHub, where we can support it more effectively.

November 13, 2018:

• Fixed the icon cutoffs.
• Streamlined the @excludes.

Source: See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

Install: Install from GitHub

Made some tweaks as follows:
June 01, 2019:

• Turned on styling for network-user pages.
• Fixed a race condition / GM_addStyle bug whereby the styles were not sticking for certain page loads.

November 16, 2018:

• Switched to proper SE image host because svgshare.com was crashing and "exceeding quota".
• Restored scripts to review paths, since they need duckies too.
• Moved the script to GitHub, where we can support it more effectively.

November 13, 2018:

• Fixed the icon cutoffs.
• Streamlined the @excludes.

Source: See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

###Install: Install from GitHub

Made some tweaks as follows:
June 01, 2019:

• Turned on styling for network-user pages.
• Fixed a race condition / GM_addStyle bug whereby the styles were not sticking for certain page loads.

November 13, 2018:

• Fixed the icon cutoffs.
• Streamlined the @excludes.

November 16, 2018:

• Switched to proper SE image host because svgshare.com was crashing and "exceeding quota".
• Restored scripts to review paths, since they need duckies too.
• Moved the script to GitHub, where we can support it more effectively.

Source: See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

###Install: Install from GitHub

Made some tweaks as follows:
June 01, 2019:

• Turned on styling for network-user pages.
• Fixed a race condition / GM_addStyle bug whereby the styles were not sticking for certain page loads.

November 16, 2018:

• Switched to proper SE image host because svgshare.com was crashing and "exceeding quota".
• Restored scripts to review paths, since they need duckies too.
• Moved the script to GitHub, where we can support it more effectively.

November 13, 2018:

• Fixed the icon cutoffs.
• Streamlined the @excludes.

Feel free to incorporate any of this into the question post, if you wish.

Made some tweaks as follows:
November 13, 2018:

Source:

See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

###Install: Install from GitHub

Version 2 reference (See GitHub for any future versions):

// ==UserScript==
// @name        Stack Exchange, replace badge icons with duckies
// @description Does what it says on the tin.
// @match       *://*.askubuntu.com/*
// @match       *://*.mathoverflow.net/*
// @match       *://*.serverfault.com/*
// @match       *://*.stackapps.com/*
// @match       *://*.stackexchange.com/*
// @match       *://*.stackoverflow.com/*
// @match       *://*.superuser.com/*
// @exclude     *://api.stackexchange.com/*
// @exclude     *://blog.*.com/*
// @exclude     *://chat.*.com/*
// @exclude     *://data.stackexchange.com/*
// @exclude     *://elections.stackexchange.com/*
// @exclude     *://openid.stackexchange.com/*
// @exclude     *://stackexchange.com/*
// @grant       GM_addStyle
// @run-at      document-start
// @version     2.0
// @history     2.0 Switch to SE image server for more reliable hosting.
// @history     2.0 Placed script in GitHub. Review gets duckies too.
// @history     1.5 Fix icon cutoff problem that many sites had.
// @history     1.0 Initial release
// @author      Samcarter
// @homepage    https://stackapps.com/q/8116/7653
// ==/UserScript==

GM_addStyle ( `
    /* change icons of badges */
    .badge1, .badge2, .badge3 {
        background-image: url("https://i.sstatic.net/zm5Pg.png") !important;
        margin: 0 !important;
        width: 14px !important;
        height: 14px !important;
    }
    .badge1 { background-position: -39px 1px !important; } /* Gold */
    .badge2 { background-position: -19px 1px !important; } /* Silver */
    .badge3 { background-position:   1px 1px !important; } /* Bronze */
` );

Source: See GitHub: Stack Exchange, replace badge icons with duckies... and post bug reports and pull requests there.

###Install: Install from GitHub

Made some tweaks as follows:
June 01, 2019:

• Turned on styling for network-user pages.
• Fixed a race condition / GM_addStyle bug whereby the styles were not sticking for certain page loads.

November 13, 2018: