Questions tagged [rodents]

Mammals of the order *Rodentia*, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws.

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1answer
92 views
+50

How do rats open a walnut?

What techniques do rats use to open a walnut? What are the traces they leave in nature? I have a book on traces that wild animals leave in nature, but it only explains squirrels (splitting the walnut ...
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1answer
107 views

Mystery rodent in Winnipeg

I spotted this rodent in Winnipeg, Manitoba, Canada on September 6, 2020. It is about 10 inches long. What is it?
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25 views

Is there any (practical) way to control a rodent population without predators?

It seems that New York has tried a number of ways to reduce their rat population, recently with fall traps. Unless they can kill all of the rats at once, it seems that this will just free up resources ...
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0answers
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Is there benefit of use of red light over dim white light when interacting with rodents in the dark phase?

I've come across some "percieved wisdom" that rats and mice do not "see" red visible light and so use of this wavelength will allow humans to interact with rats in their active nocturnal phase without ...
2
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0answers
61 views

Small mammal identification

Small skull found in Alberta, Canada. Do not know the region. Skull is about 17 mm in length. Trying to identify the species, narrowed it down to most like a species of vole but can't figure out which ...
3
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1answer
14k views

Why do Guinea Pigs chirp / sing?

Ok, so this appears to be quite a mystery. Me and my girlfriend have 2 Guinea Pigs, 1 male and 1 female. My girlfriend once picked up the female one and took her outside into our garden. The Guinea ...
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0answers
38 views

Which agricultural crops attract rodents?

Are there any data on rodent populations per acre of different types of agricultural crops?
5
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1answer
79 views

How do rodenticides with delayed effect work?

Most modern rodenticides are claimed to cause death no earlier than several days after ingestion. That's quite strange - once a chemical was ingested it will be absorbed in the digestive system and ...
2
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1answer
2k views

Why do rodents' teeth continue to grow?

Why do rodents' teeth continue to grow? Enamel formation and/or root formation continue throughout rodents' lives. What's the mechanism that causes this?
5
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1answer
345 views

Why was polyploidy not lethal in certain octodontid rodents?

As discussed in Why is polyploidy lethal for some organisms while for others is not?, polyploidy is normally lethal in mammals. However, two species of Octodontidae (South American rodents), are ...
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1answer
2k views

How do porcupines keep from pricking each other while mating?

How do porcupines keep from pricking each other while mating? It seems like they would constantly be scratching each other.