Sentence examples for beak length from inspiring English sources

Decades ago the evolutionary biologist Richard Dawkins suggested that one could study the evolution and genetics of behavior just the way one studies the evolution of body shape: concentrate on what animals build — birds's nests, beaver dams, termite mounds — and treat them like beak length or coat color.

White-beaked dolphins are most likely to be confused with Atlantic white-sided dolphins, from which they can be distinguished by differences in coloration and beak length.

Within an estimated 100 generations and less than 50 years, bugs on the new hosts have already evolved differences in survivorship of the young, flight apparatus, beak length, and other features, in contrast to vine-dwelling populations.

Instead of the expected ratios of features in hybrid offspring that would indicate the action of new mutations, says Carroll, the team found evidence instead that interactions among combinations of genes underlie characteristics such as increased beak length, the team reports online 14 May in Biology Letters.

Morphometric data show that Huia males had an average beak length of 52.8 mm, whereas female beaks were typically much longer, with an average of 77.9 mm.

Moreover, four DNA-sexed females were indistinguishable from males in terms of beak length (Figure 3; these individuals are indicated by black triangles).

To test the null hypothesis that there was no difference in the variance between male and female beak lengths, we conducted a one-tailed F-test.

Morphometrics were taken as described by Dunn and Wright [ 42]: wing length was used as a measure of feather growth, and head-beak length and tarsus length as measures of body size.

Model structure and predictor variables were identical to those constructed for estimating WBC index with the exception of the response variable; these models were repeated with head-beak length and tarsus length as response variables to determine whether any associations with parasitism were with size or with feather length.

The researchers observed that the crows dropped a large percentage of stones in the tube filled with water until their floating reward was at a beak's length.

The owls shown are recognizable, but not sculpted naturalistically: the shape of the beak, the length of the legs, and details of plumage deviate from those of the owls that are indigenous to the region.