The American pika is not listed as threatened or endangered, but its population is decreasing overall, according to the International Union for Conservation of Nature (IUCN).

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"There's still time to prevent the worst impacts of climate change.

The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument is operating on both the Terra and Aqua spacecraft.

"We found old pika fecal pellets buried in sediment in nearly every patch of habitat we searched," Stewart says.

"But the animals themselves were conspicuously absent." Pikas definitely once lived there, so to figure out when they disappeared, the researchers relied on radiocarbon dating. Their findings suggest pikas vanished from many lower-elevation sites around Mount Pluto before 1955, but held out near the mountain's peak until as recently as 1991.

It has a viewing swath width of 2,330 km and views the entire surface of the Earth every one to two days.

Its detectors measure 36 spectral bands and it acquires data at three spatial resolutions: 250-m, 500-m, and 1,000-m.

Stewart and his colleagues searched the 64 square miles over the course of six years, from 2011 to 2016.

They looked for the animals' distinctive droppings, which can last a long time because boulders often protect them from sunlight and rain, and camped next to former pika habitats, listening for their squeaky bleats.

MODIS filenames (i.e., the local granule ID) follow a naming convention which gives useful information regarding the specific product. A2006001.h08v05.005.2006012234657indicates: The MODIS Long Name (i.e., Collection-Level) convention also provides useful information.

For example, all products belonging to the MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid V005 collection have the following characteristics: The high level MODIS Land products distributed from LP DAAC are produced at various temporal resolutions, based on the instruments' orbital cycle.

And while pikas can flee warmth by moving higher up mountains, that strategy only works until they reach the top.