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Kavanau (1987) was the first to find that unique bi-parental care seen in modern birds probably evolved from extinct birds. They developed the ability to provide protection, escorting, nurturing and egg guarding abilities for their young. Evolution of homeothermy and flight most likely occurred in bi-parental birds with precocial chicks.
In birds, this parental care system is generally attributed to the ability of male birds to engage in most parental behaviours, with the exception of egg-laying. Due to their endothermy and small size at birth, there is a huge pressure for infant birds to grow up quickly to prevent energy loss.
A robin-sized bird, the dunnock typically measures 13–14.5 cm (5.1–5.7 in) ... In pairs, the male and the female invest parental care at similar rates. However ...
In contrast to the large clutch sizes found in many bird species with biparental care, bats typically produce single offspring, which may be a limitation related to lack of male help. It has been suggested, though not without controversy, that paternal care is the ancestral form of parental care in birds. [9]
Parental care is a form of altruism, which means that the behaviors involved often require a sacrifice that could put their own survival at risk. [1] This encompasses behaviors that aid in the evolutionary success of the offspring and parental investment , which is a measure of expenditure (time, energy, etc.) exerted by the parent in an ...
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The American robin (Turdus migratorius) is a migratory bird of the true thrush genus and Turdidae, the wider thrush family. It is named after the European robin [ 3 ] because of its reddish-orange breast, though the two species are not closely related, with the European robin belonging to the Old World flycatcher family.
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