The Wide Spectrum Of Overt Responses To Intrinsic Urges And Extrinsic Stimuli By Human And Animal Populations Or Individuals Comprehensively Termed As Ethology Or Behaviour Contributes To Their Very Survival And Success Irrespective Of Their Level Of Organization. In This Compendium, Articles Reflecting A Wide Array Of Behavioural Manifestations Are Presented Function/Phenomenon-Wise Rather Than Evolutionary Group-Wise With A View To Provide The Reader An Opportunity To Look How Living Beings Ranging From Highly Placed Humans To Lowly Placed Invertebrates React To/Respond To/Tackle Similar Situations Such As Foraging, Social Life, Mating, Reproduction, Parental Care And Environmental Stresses. It Is Hoped The Book Would Provide Interesting Reading Material To Researchers And General Readers.