PNG ICO ICNS MORE
Avatars & smileys
3D
Birdies
bird, Thunderbird
Black
512x512
UI
Glyph
Token
Thunderbird
128x128
Family & home
Old school by Babasse
Animal, Thunderbird, eagle
Travel & hotels
Bags and boxes
Computer & hardware
Human o2
Thunderbird, mozilla
mozilla, Thunderbird
Desktop apps
Smooth
iSuite Revoked
Orb icons
3D Cartoons III
Ecqlipse 2
Crystal Project
256x256
KDE Crystal Diamond
22x22
Nuvola
Email, mozilla, Thunderbird