In the scenario where a drought occurs and wipes out the plants in the habitat, the outcomes for each bird species would likely be as follows:
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Bird Species A (the seed eater): Since this bird species relies on plant seeds for food, the loss of plant life due to the drought would severely impact its food source. If the drought persists and seeds remain unavailable, this bird species may face starvation, leading to a population decline or even extinction if the drought lasts long enough.
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Bird Species B (the nectar drinker): This bird species feeds on flower nectar, which also depends on the presence of flowering plants. With the plants wiped out entirely, this bird will be unable to find its primary food source. Like Bird A, it would likely face starvation and a decline in its population unless it can adapt to find alternative food sources.
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Bird Species C (the seed eater): If this bird also primarily feeds on plant seeds, its outcome would be similar to Bird A. The absence of seeds due to the drought would lead to food scarcity, resulting in potential starvation and a decline in population.
In summary, all three bird species are likely to suffer severely due to the drought. Bird Species A and Bird C (both seed eaters) would face significant food shortages, while Bird B (the nectar drinker) would also be unable to find food. If the drought lasts for a prolonged period, all three species risk extirpation from the habitat. However, if any of the birds have flexible diets or can migrate to areas with better resources, they might have a better chance of survival.