Biological father –  or sometimes simply referred to as "Father" is the genetic father of a child. Posthumous father – father died before children were born (or even conceived in the case of artificial insemination). Putative father – unwed man whose legal relationship to a child has not been established but who is alleged to be or claims that he may be the biological father of a child. Sperm donor – an anonymous or known biological father who provides his sperm to be used in artificial insemination or in vitro fertilisation in order to father a child for a third party female. Also used as a slang term meaning "baby daddy". Surprise father – where the men did not know that there was a child until possibly years afterward
Teenage father/youthful father –  Father who is still a teenager. Non-biological (social and legal relationship)
Adoptive father – the father who has adopted a child
Cuckolded father – where the child is the product of the mothers adulterous relationship
DI Dad – social/legal father of children produced via Donor Insemination (where a donors sperm were used to impregnate the DI Dads spouse)
Father-in-law – the father of ones spouse
Foster father – child is raised by a man who is not the biological or adoptive father usually as part of a couple. Mothers partner – assumption that current partner fills father role
Mothers husband – under some jurisdictions (e.g.
When the families of most of these waterfowl travel, they usually travel in a line and the fathers are usually the ones guarding the offspring at the end of the line while the mothers lead the way. The female seahorse (Hippocampus) deposits eggs into the pouch on the males abdomen. The male releases sperm into the pouch, fertilizing the eggs. The embryos develop within the males pouch, nourished by their individual yolk sacs. Male catfish keep their eggs in their mouth, foregoing eating until they hatch. Male emperor penguins alone incubate their eggs; females do no incubation. Rather than building a nest, each male protects his egg by balancing it on the tops of his feet, enclosed in a special brood pouch. Once the eggs are hatched however, the females will rejoin the family. Male beavers secure their offspring along with the females during their first few hours of their lives. As the young beavers mature, their fathers will teach them how to search for materials to build and repair their own dams, before they disperse to find their own mates. Wolf fathers help feed, protect, and play with their pups. In some cases, several generations of wolves live in the pack, giving pups the care of grandparents, aunts/uncles, and siblings, in addition to parents. The father wolf is also the one who does most of the hunting when the females are securing their newborn pups. Coyotes are monogamous and male coyotes hunt and bring food to their young.