We describe the design of a force-transducing perch which measures the
reaction forces of small birds taking off and landing. In common star
lings, landing forces are lower than take-off forces, because the bird
may decelerate prior to landing by using its wings. Both landing and
takeoff forces are significantly correlated with body mass; however, t
he angles of these reaction forces show no significant mass-dependence
and are not repeatable within individuals. Diversity in take-off or l
anding strategy could be advantageous in confusing predators.