Bird's-foot Trefoil is so named because its seed pods are arranged like a bird's foot. It has clusters of 3-8 flowers arranged circularly at the top of the stalk. The flowers are yellow, but often with orange or red streaks.
It was originally grown for fodder, and it can reduce methane emissions from cows. The pasture plant tends to be a larger variety, and is often seen on roadsides.
There is also a taller species, Greater Bird's-foot Trefoil, which is hairier and grows in wetter areas. Another main difference between the two species is that the calyx-teeth of the Greater BFT spread at right angles when the flower is in bud.
Bird's-foot Trefoil also has similarities to Meadow Vetchling, but does not have tendrils.

Seed pods, in the shape of a bird's foot		Leaves: trefoil with 2 stipules, not hairy		Calyx: not reflexed in bud