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I couldn't find any information about ants starving in times of plenty, most likely since it's difficult to determine whether an ant colony is "letting" certain members starve or whether the ants have just died for whatever reason. To your second question, though, yes! This paper, The Effect of Colony Size and Starvation on Food Flow in the Fire Ant by ...


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I will assume that you are talking about Mallards, although other wildfowl are likely to exhibit similar behaviors. Mallards aren't actually solitary during the summer, instead they form breeding pairs. They form groups (sords) in the winter to migrate and for protection while moulting. ...


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From this paper about black-headed gulls responding to a hedgehog: The gull might peck the intruder, or strike it with its feet. Pecks were mostly directed at the hedgehog's head and might be delivered after a horizontal approach with the wings partly lifted. Although not directed at the eyes specifically, they observed the birds directing attacks ...



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