ShmoopTube

00:02

okay more love fest with the animals here hand me some bark to chew on it's [writing on bark of tree in forest]

00:07

good stuff which best makes a relationship between bird densities and [text on screen]

00:10

noise levels I mean it's on line 44 they come take a look so a relationship know

00:19

extent that I conducted in the Netherlands found at 60% woodland bird

00:22

species showed reduced numbers near roads correct answer D there for birds

00:27

the ability to make and hear calls is important but different birds have [bird bathing]

00:31

different calls and like people the passage explicitly states right there [people on the phone]

00:36

birds with higher frequency calls were less likely to avoid roadways then birds [text on screen]

00:40

with lower frequency calls birds capable of high frequency calls didn't need to

00:44

avoid roadways to the same extent because they could hear each other [bird on bush]

00:47

better over the traffic noise right so cars tend to be lower frequency sounds

00:53

worse birds or kind of sounds yeah and that penetrates things like wood a [forest]

00:58

little better at least that leaves around them around trees yeah well since

01:01

the road noise is lower frequency while birds with similar calls would need to [heavily trafficked highway]

01:05

avoid the area more not less so get rid of a there's also no mention of trees or

01:10

types of road so get rid of B and C they're easy it's d and we're all just

01:15

trying to be very quiet here as we study the yellow-bellied thrusted shmooper [woman looking through binoculars]

01:23

you

Full Transcript