Social behavior/ Agonistic, Altruistic, Kinship

1. http://www.yourarticlelibrary.com/sociology/kinship-and-family/kinship-meaning-types-and-other-details/34960

2. https://www.sociologydiscussion.com/kinship/kinship-meaning-types-and-other-information/2330

3. Perspective of on animal behavior by Goodenough, McGuire and Wallace. pp.634-678.

Practical:

Observation of birds nests and study of parental behaviour.

1. http://ecosystema.ru/eng/eftm/manuals/sm05.htm