Precocial Birds

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Precocial Birds

 

(also, nidifugous birds or praecoces), birds whose eyes and aural openings are already open at hatching or soon thereafter and whose down covering is well developed. Precocial birds are adapted to moving independently (walking or running), and thermoregulation is established early in them. Many can search for food indepenently. Precocial birds constitute one of the basic subdivisions of the bird family by virtue of their postembryonic development. The behavior of the young of precocial birds varies. In large-footed chickens, for example, the young can flutter about immediately and are completely independent of their parents at the time of hatching. The young of ducks and cranes feed independently but stay with their parents. In certain chickens, the young follow their parents, who show them food. Among the rails and sheldrakes the parents feed the young. An example of partially precocial birds is the gull. Young gulls appear with open eyes and are well feathered, but for a certain period of time they remain in the nest and the parents feed them.

G. P. DEMENT’EV

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The obtained results in this study suggests a low of dependence of newborn precocial agouti on maternal nutrition and may explain the large populations of wild agouti, since newborn agouti may not necessarily need to suckle and possess the ability to feed themselves from birth (Sikes and Ylonen, 1998), the generation interval may be decreased, resulting in growing populations of wild agouti in the Neotropics.
Adoption in a precocial species, the Lesser Snow Goose: Intergenerational conflict, altruism or a mutually beneficial strategy?
Este valor no pudo determinarse con mayor exactitud por la caracteristica precocial de los pichones de abandonar el nido a los pocos dias de eclosion, la asincronia reproductiva y las frecuencias de las salidas de campo.
The male handles most of the incubation duties, which can mean sitting on the egg for up to 80 days until the precocial young, capable of moving on their own, hatch.
A independencia do filhote precocial e, parcialmente, consequencia de um aporte completo de nutrientes durante a fase embrionaria, cujas reservas sao proporcionais ao tamanho do ovo (BLOMQVIST et al., 1997; REED et al., 1999).
What, in the bird and animal worlds, are the meanings of the opposing terms altricial and precocial?
These birds are precocial, leaving the nest soon after hatching so it is critical that they develop a bond with their parents quickly after birth.
The young of some species are precocial. They are fully developed at birth, with their eyes open and a full coat of hair and they are able to function with a degree of independence.
ANSWERS: 1 Whitechapel; 2 Altricial means being born dependent on its parents; precocial being immediately self-sufficient; 3 A.S.
Adaptative precocial reproduction in voles: reproductive costs and multivoltine life-history strategies in seasonal environments.
These altricial (less specialized) or precocial (more specialized) alternatives are caused by differences in the provision of endogenous food (e.g., yolk) in early development, among other factors, and are a response to changing environments.
Turkeys are precocial (prih-CO-shul); the newborns develop physically and socially early.