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- 2022-5-17
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1:state a problem
有950种蝙蝠,但是red databook只写了33种
为什么要报道和是事实差距那么大的数字
2:first reason: geographic bias
there are only 39 species of bats in north america
only 5% of them are considered threatened
the igornance cause them being far from reflecting reality
3: second reason: we do not know how to dertermine the accuracy of the data
we know so little about many species
and we are lack of data to determine whether they are decreasing or stable
lack information caused inaccuracy
4: a new approach to correct the problem
state an error: if he species is not lsted, it is not endangered, but we do not know much of them
probem: we have to record their rate, but the data is not available
jeopardy 危险的
create a Green List:record the secure animals rather than the endanger ones
if the species are not in the green list, they are considered to be threatened
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