existingGRADEDmailMail · DAY 5 'ledge nests' (graded: two texts)
| list · subject | Fwd: Fwd: re: ledge nests |
|---|
| list · preview | Your namesake made the science page. |
|---|
Your namesake made the science page. Who’s right?
---------- Forwarded message ----------
From: R. Hollis · To: Imani Okafor
Imani, I’d put it another way. To a falcon, a window ledge forty floors up simply is a cliff ledge: high, sheer, open sky above and pigeons passing below. The birds are doing what peregrines have always done. What changed was us. Once DDT was banned, the population recovered and needed places to nest, and our cities turned out to be full of them.
Imani Okafor wrote:
Peregrine falcons now nest on skyscrapers, bridges and smokestacks in dozens of North American cities. I’d call it one of the clearest recent cases of rapid behavioral adaptation. Within a few decades, a bird once tied to remote cliffs has learned to treat the built city as a new kind of habitat, and to thrive in it.
If Hollis answered her in one line, which would he send?
- “Agreed, and the DDT ban only sped that adaptation along.”
- “The behavior isn’t new. The city just offers the old setting.”
- “I doubt they nest in as many cities as you say.”
- “Cliffs have become worse places to nest than buildings.”
Key: “The behavior isn’t new. The city just offers the old setting.”
MAIL · TWO TEXTS
He grants where they nest and denies that the birds changed.
phone-mail-day5-ledge-nests