"Alligator" is the second single taken from Canadian rock duo Tegan and Sara's sixth studio album Sainthood (2009).

[2][3] The single charted at number 32 in the Billboard Hot Dance Club Songs.

I picked a piano riff that I thought was cool, looped it, and just started building from there.

AllMusic writer Tim Sendra called the song "catchy", while BBC said "Sara's songs are woozy, inventive, heavily electronic affairs: cold, stark opener "Arrow", the seasick, disembodied "Night Watch" and the baroque disco of "Alligator" are all her tracks and all album highlights.

[7][8] The video for "Alligator" starts off with Sara lying in a bed covered in snow, and Tegan inside of an igloo as they both sing the song.