The love of a father for his children know no bounds, whether human or animal. In these beautiful photos of animal breeding, you will recognize many of the tender and stressful moments of childhood that can be experienced either as a parent or child. Environmentalists have to separate the animals into two groups based on their upbringing - r and K. The K categories category includes animals with relatively few offspring and long gestation periods. Due to the small number of offspring, they require more care and more time spent - the kind of parenting that are used. Parents category r value more quantity than quality, and have many babies that grow quickly and individually, and have little chance of survival.