Calibrated digital photography is frequently used in studies focusing on avian eggshell
appearance to measure colour and pattern features. Photographs are often taken in natural …

Colouration and patterning are widespread amongst organisms. Regarding avian eggs,
colouration (reflectances) has been previously measured using spectrometers whereas …

Addiction is characterized as a chronic debilitating disease. One devastating feature of
addiction is the susceptibility of relapse (40–60%) after stretches of abstinence. One theory …

Variation in blue‐green and brown coloration of avian eggshells could be affected by
several factors, including environmental nutritional constraints. Better availability of nutrients …

Many passerines lay protoporphyrin-pigmented eggs, and the degree of spotting seems to
be related to female condition and environmental characteristics. However, most studies …

Differences in avian eggshell pigmentation could be an honest signal of female quality that
males use to inform their nestling provisioning effort. We investigated whether among …

A devastating feature of drug dependence is the susceptibility of relapse (40–60%) after
stretches of abstinence. In both animal and human research, it has been demonstrated that …

Spottiness is an important component of the morphology of bird eggs and a number of
methods have been developed for characterizing variation in spottiness. We developed a …

The striking variation in colour and maculation of bird eggs has fascinated biologists since
centuries, and many hypotheses based on mechanical, physiological or signalling functions …

Several selection pressures may explain the evolution of avian eggshell coloration patterns.
In cavity-nesting species, there are two main non-exclusive hypotheses. The sexually …