The curves converge for high bite force to a theoretical
minimum time necessary to crack a seed. This is the time
necessary to process a seed with one single, successful cracking
attempt. The minimum husking time is the same for the two
families. Fringillids require a minimum time of 1.8·s to crack
a hemp seed; the extrapolated prediction for estrildids is 1.4·s.
From the baseline representing minimum husking time there is
a rapid increase in husking time with decreasing bite force