Backyard birding story problem
Backyard birding math, from Journey North:
Last time you read Be Mine! Robins and Their Mates. We said that one scientific study showed that about 75% of all fledgling robins die before November their first year. Of those that survive that long, about half die before the next November. About half of all 2-year-old robins die each year, and about half of all robins of every other age die each year, too. If this is true, what’s the answer to…
Challenge Question #9:
“If 200 robins were fledged in a town one year, how many of the fledglings would be alive in November? How many would be alive the following November? How many would be alive the November after that? How many years would it be before all these fledglings had probably died?”
The numbers in the study surprised me. No wonder robins generally raise two broods every year. Then one bird might survive the winter!
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backyard birding, birding, birdwatching, story problem
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