usually not paying enough attention to animal behavior, yet holds a wealth of information and not a few surprises. Recently, Lucas and Ricardo Juncal Lareo, regular visitors and keen observers, witnessed in Plaiaundi of unusual behavior: a coot (Fulica atra ) adult killed a chicken of the same species. Chicken, just one week, was helpless and piaba intensely, trying to approach the adult. So, instead of arousing the protective instincts of his father appeared to be motivated by the contrast it to undertake a severe pecking away with the life of the chick, coming to finish him off when floating and lifeless, to the amazement of observers. Looking
explanation for the phenomenon, we have found two possible variants. A call would be within the intraspecific parasitism (conspecific brood parasitism), in which some females would lay eggs in nests of other couples of the same species as a means to increase their reproductive success. In the case of the coot this behavior is found, and its success or failure depends on the adoptive parents' ability to detect foreign eggs or chicks, if so, parents end up with the intruder. Another possibility is generally known in the animal world and has been described recently in the case of the coot. It is the decision of the parents, if resources are scarce, consciously and deliberately to end with one of his chickens to increase the chances of survival of their siblings. In this case, parents choose to ensure the development of part of the brood, rather than bear the risk of losing whole by malnutrition or predation. In any case, any explanation fits in the overall scheme of neo-Darwinian evolution, under the premise that each individual is called to widespread their genetic endowment.
These phenomena illustrate how deep within our limitations, judge and jury, to observe and describe the general nature and the animal world project in particular without values \u200b\u200bconsidered characteristic of human societies, such as justice, equality and compassion. Thanks to Ricardo Juncal and for their contribution.
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