Rip2632: Plenty of gambits in Bird's Opening but From's Gambit variations seem most popular: Bird's Opening
From's Gambit – A02 – 1.f4 e5
From's Gambit, Bahr Gambit – A02 – 1.f4 e5 2.Nc3
From's Gambit, Lipke Variation – A02 – 1.f4 e5 2.fxe5 d6 3.exd6 Bxd6 4.Nf3 Nh6 5.d4
From's Gambit, Lasker Gambit – A02 – 1.f4 e5 2.fxe5 f6
From's Gambit, Platz Gambit – A02 – 1.f4 e5 2.fxe5 Ne7
From's Gambit, Schlechter Gambit – A02 – 1.f4 e5 2.fxe5 Nc6
From's Gambit, Langheld Gambit – A02 – 1.f4 e5 2.fxe5 d6 3.exd6 Nf6
From's Gambit, Siegener Gambit – A02 –1.f4 e5 2.d4 exd4 3.Nf3 c5 4.c3
Sturm Gambit – A03 – 1.f4 d5 2.c4
Swiss Gambit – A02 – 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
Swiss Gambit, Wagner-Zwitersch Gambit – A03 – 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
Williams Gambit – A03 – 1.f4 d5 2.e4
Hobbs Gambit – A02 – 1. f4 g5
Hobbs-Zilbermints Gambit – A02 – 1.f4 h6 2.Nf3 g5
Dutch, Dudweiler Gambit – A02 – 1.f4 d5 2.g4
Dutch, Batavo Gambit – A02 – 1.f4 d5 2.Nf3 c5 3.e4 dxe4
Dutch, Thomas Gambit – A02 – 1.f4 d5 2.b3 Nf6 3.Bb2 d4 4.Nf3 c5 5.e3
Dutch, Williams, Zilbermints Variation – A02 – 1.f4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Nge2