Batwing Distribution

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A descriptor for shaggy, bilateral peri-hilar lung opacifications, seen on an AP chest film, due to intra-alveolar fluid exudation, first described in uraemia, but more typical of pulmonary oedema; it may occur in pulmonary alveolar proteinosis
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Finally, natural influences can affect butterfly distribution and abundance.
Using data on butterfly distributions and abundances, collected by members of the public since the 1970s through 'citizen science' schemes, Louise Mair, a PhD student in Biology at York, and her colleagues examined factors limiting butterfly range expansion.
mapped butterfly distributions in various terrains within the southeast rain forest of Madagascar.