Since geckos, other lizards, and other terrestrial animals actually have similar allometric slopes but geckos have a different intercept, it is likely that a mass-independent mechanism is responsible for the increased fuel economy in geckos.
(geckos, other lizards, and other terrestrial animals; actually have; similar allometric slopes) (geckos; have; a different intercept)
geckos, other lizards, and other terrestrial animals geckos
actually have have
similar allometric slopes
a different intercept