The gang ends "Wet Hot Archosaur Summer" with the final podcast recorded from our undisclosed location in the woods. For this podcast, we indulge Amanda by talking about birds and trace fossils. The first paper looks at the remains of nesting sites that date back to the Cretaceous, and the second paper investigates sources of error in estimates of avian maximum speeds from trace fossils. Meanwhile, Amanda has a message for the bears, James proposes an alliance with the crows, and Curt does an "homage".

Up-Goer Five (Curt Edition):

The friends talks about two papers that will make one of them very happy because they are all about the ways that animals that fly can make marks on the ground to let us know about how they move. The first paper looks at where these animals that fly will make their home. This paper shows that animals that fly have been found in this cold place near the top of the world for a really long time. This place would not have been as cold as it is today, but would have been dark for half the year. Some of the animals they find in this area look like they would have moved in when things were good and left when things got bad. This is something we see animals that fly do today in the top of the world as well.

The second paper looks at how we try and use how these animals make marks on the ground to see how fast they would move. The paper shows that the way we were doing it in the past kind of worked, but also didn't work. This is because when these animals that can fly move, they do not move in the same way as other animals all the time. And so the way that these things walk is important if we want to try and understand more about how fast they could move from the marks on the ground.

References:

Wilson, Lauren N., et al. "Arctic bird nesting traces back to the Cretaceous." Science 388.6750 (2025): 974-978.

Prescott, Tash L., et al. "Speed from fossil trackways: calculations not validated by extant birds on compliant substrates." Biology Letters 21.6 (2025): 20250191.