The dog is a unique species due to its wide variation among breeds in terms of size, morphology, behaviour and lifespan, coupled with a genetic structure that facilitates the dissection of the genetic architecture that controls these traits.
The western jackdaw is very similar in morphology, behaviour, and calls to the Daurian jackdaw, with which its range overlaps in western Asia.
Life aspect of extinct mammals can be highly informative to assess their morphology, behaviour and ecology.
Pygmy grasshoppers (Tetrix subulata) are characterized by extensive polymorphism in colour pattern, morphology, behaviour and physiology.
In animals, most attention has been given to predator-induced changes in external morphology, behaviour, and life history, while underlying physiological responses remain little explored [2], [3].
All strains appeared to have normal morphology, behaviour and fertility during standard culture conditions.
We expect that follow-up investigations of sequence variation at other loci, and studies on morphology, behaviour, vocalization and distributions (e.g., ref. [47]) will rapidly advance understanding of the diversity and diversification of the Neotropical avifauna.
Analysis and understanding of a given mimicry system require a rather comprehensive knowledge of morphology, behaviour, ecology, and mutual relationships of animals usually in different classes for example, wasps (Hymenoptera), flies (Diptera), insect-eating amphibians, reptiles, birds, and small mammals.
Beginning in the mid-20th century, ornithologists made a concerted effort both to augment some of the century-old work on passerine anatomy and to explore new avenues of morphology, behaviour, reproductive patterns, biochemistry, and zoogeography.
Consequently, extensive information is available on their natural history, morphology, behaviour, reproduction, evolutionary history and population genetic structure, which provides a rich basis for interpreting genetic data [ 2].
Although various studies based on morphology, behaviour, vocalisation, protein electrophoresis, karyotyping and DNA sequencing were conducted [ 3- 5, 7, 17- 35], neither a congruent phylogeny nor a consistent taxonomic classification was obtained.
