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Grebe
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===Breeding and reproduction=== Grebes are perhaps best known for their elaborate courtship displays. Most species perform a duet together and many have their own synchronized rituals. Some, like those species in the genus ''[[Podiceps]]'' do a "penguin dance" where the male and female stand upright, breast posturing out and run along the water's surface. A similar ritual in other species is the "weed dance" in which both partners hold pieces of aquatic vegetation in their bills and are positioned upright towards each other. There is also the "weed rush" in which partners swim towards each other, necks stretched out with weeds in their bill, and just before colliding position themselves upright and then swim in parallel.{{cn|date=April 2023}} In the smaller and basal genera like ''Tachybaptus'' and ''Podilymbus,'' there is incorporation of aquatic vegetation in their courtship, but it is not as elaborate as the more derived and larger species. It has been hypothesized that such courtship displays between mates originated from intraspecific aggression that evolved in a way that strengthened pair bonds. Once these courtship rituals are completed, both partners solicit copulation towards each other and mount on floating platforms of vegetation. Females lay two to seven eggs and incubation can last nearly a month. Chicks of the nest hatch asynchronously. Once the whole nest has hatched, the chicks begin to climb on one of their parent's backs. Both parents take care of rearing their young, and the duration of care is longer than those of other waterfowl. This enables a greater survival rate for the chicks. One parent dives for food, while the other watches the young on the surface.<ref name="Johnsgard1987" /><ref name="Ogilvie2002">{{cite book | last1 = Ogilvie | first1 = M. A. |year=2002 |title=Grebes of the World. | publisher= Bruce Coleman Books | location= | isbn = 978-1872842035}}</ref>{{Rp|14–16}}<ref name="Fjeldså2004">{{cite book | last1 = Fjeldså | first1 =J. |year=2004 |title=The Grebes. | publisher=Oxford University Press | location=Oxford | isbn = 978-0198500643}}</ref>{{Rp|113–114}}
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