Is there a difference between a herd and a pack?

Pack is usually only used for carnivores, while herd tends to be used for herbivores, but there's no strict rule.

Did the museum add artificial colouring to the footprints (at 0:40)? Or is there another reason why these are so red? Update: 2 Khan Academy users say the red is natural, 2 say the red is added.

They're probably red because they're sandstone. Sandstone can be red.

How could a dinosaur footprint have lasted millions of years? It seems like just a little weather (rainstorm or such) would wipe them right out!

I would imagine that the substance that the dinosaur walked in probably hardened over the years making it so their footprints would stay even if it rained.

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Course: American Museum of Natural History > Unit 1

Lesson 2: How do scientists study dinosaurs?

Did dinosaurs travel in herds or packs?

Google Classroom

The most definitive evidence that dinosaurs traveled in groups comes from sequences of fossilized footprints called trackways. Several track sites have now been found that suggest herding behavior in some groups of dinosaurs. At the Davenport Ranch site outside San Antonio, Texas, R. T. Bird of AMNH discovered an amazing set of sauropods tracks in 1940. Detailed analyses of these trackways reveal a herd of 23 sauropods rambling over muddy ground at a pace of about 2 meters per second. The pattern of overlapping tracks indicates that the largest adult sauropods led the herd, followed by smaller individuals. Created by American Museum of Natural History.

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Anna
Posted 10 years ago. Direct link to Anna's post “Is there a difference bet...”
Is there a difference between a herd and a pack?
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(9 votes)
Answer
- Peter Collingridge
  Posted 10 years ago. Direct link to Peter Collingridge's post “Pack is usually only used...”
  Pack is usually only used for carnivores, while herd tends to be used for herbivores, but there's no strict rule.
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  (10 votes)
Madeliv
Posted 10 years ago. Direct link to Madeliv's post “Did the museum add artifi...”
Did the museum add artificial colouring to the footprints (at
0:40
)? Or is there another reason why these are so red?
Update: 2 Khan Academy users say the red is natural, 2 say the red is added.
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(5 votes)
Answer
- Marvin the Muffin Man
  Posted 9 years ago. Direct link to Marvin the Muffin Man's post “They're probably red beca...”
  They're probably red because they're sandstone. Sandstone can be red.
  Comment on Marvin the Muffin Man's post “They're probably red beca...”
  (4 votes)
Michœl
Posted 10 years ago. Direct link to Michœl's post “How could a dinosaur foot...”
How could a dinosaur footprint have lasted millions of years? It seems like just a little weather (rainstorm or such) would wipe them right out!
Button navigates to signup pageComment on Michœl's post “How could a dinosaur foot...”
(5 votes)
Answer
- Anthony Jacquez
  Posted 10 years ago. Direct link to Anthony Jacquez's post “I would imagine that the ...”
  I would imagine that the substance that the dinosaur walked in probably hardened over the years making it so their footprints would stay even if it rained.
  Button navigates to signup page
  (2 votes)
SeaSerpent 🐉
Posted 7 years ago. Direct link to SeaSerpent 🐉's post “In the Jurassic Park movi...”
In the Jurassic Park movies, velociraptors travel in packs. Is there any evidence to support that? Did velociraptors travel in packs?
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(1 vote)
Answer
- tysumner
  Posted 6 years ago. Direct link to tysumner's post “yes they did but their si...”
  yes they did but their size was exaggerated their 5 ft long and 3 ft tall
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  (1 vote)

Video transcript

Probably our best evidence comes from the footprint record because dinosaur footprints are very very common all over the world, and if you go out and you look at them you can see the flocks of dinosaurs moving in one direction and not only moving in one direction because, you could say, well you know that this is that the mud flat right, and you have a dinosaur walks down there one-day and then his brother walks down there the next day so its preserving if over a number of days, but in many cases you can tell by the pattern of overlap of the tracts themselves that that they were made at the same time, or group of animals which are walking straight and they're undulating from right to left and stuff and tracking each other so we have a pretty strong evidence that several different groups of dinosaurs, you know, traveled in flocks. Now, did they all do? No, I mean, just like mammals today, that we have some animals which herd, we have other animals which are solitary, so it's not they all did but certainly we have evidence that some kinds did.