Species can be recognized by their morphological characteristics and songs. Download Download Share on Facebook Share on Twitter Rotate quotes characteristic morphological recognize
Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are subject to natural and sexual selection. Peter R. Grant adultbasisbird Change image and share on social
Almost nothing is known from hybridization studies about the inheritance of courtship behavior of females, or of their responsiveness to particular male signals. Peter R. Grant behaviorcourtshipfemale Change image and share on social
Males transmit signals in courtship through behavioral displays. Peter R. Grant behavioralcourtshipdisplay Change image and share on social
To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life. Peter R. Grant behavioraldetermineearly share on social
It is characteristic of science that the full explanations are often seized in their essence by the percipient scientist long in advance of any possible proof. John Desmond Bernal advancecharacteristicessence Change image and share on social
A wise woman recognizes when her life is out of balance and summons the courage to act to correct it, she knows the meaning of true generosity, happiness is the reward for a life lived in harmony, with a courage and grace. Suze Orman actbalancecorrect share on social
