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11

Various features of brain,skull and beak anatomy help to achieve protection. A paper was published in PLoSOne in 2011 on this very topic: Why do woodpeckers resist head impact injury: a biomechanical investigation There is also a very readable summary on the BBC website. I advise that you read the whole article, but here is a quotation which lists the ...


10

Well, first off, they have eyes, so there's that. However, a lot of what ants wish to achieve can be done through a combination of a random walk and chemical trails. When ants are exploring their surroundings, they are essentially wandering about without much in terms of a sense of purpose; laying down a chemical signature as they go. When they find ...


6

Gibson (2006) identified three characteristics that help woodpeckers avoid brain injury: their small size, which reduces the stress on the brain for a given acceleration the short duration of the impact, which increases the tolerable acceleration the orientation of the brain within the skull, which increases the area of contact between the ...


4

Looks like a mountain beaver (Aplodontia rufa) to me. Location, appearance, and minimal tail all match. A bit more detail: Where I'm from on Washington's Olympic Peninsula, they're not uncommon, but Butte County is near the southern end of their distribution (eol map page) and they may be less common there, and limited to cooler higher elevations (Beier ...


3

It is probably Daddy Longlegs (Leiobunum vittatum) this invert color image show the resemblance. Source: http://www.insectidentification.org/insect-description.asp?identification=Eastern-Harvestman http://bugguide.net/node/view/840130 Might be eating a cockroach: UPDATE: OR It might be Mitopus morio(modern harvestman)


3

Yes, they can understand some words and even simple sentences. Here is what Animal Planet says: Studies show that the average dog can understand about 165 different words, in some cases more if you make a point of training them. This includes the basic commands such as "sit," "stay," and "go," as well as a range of other terms, assuming they're tangible ...


3

This due to a phenomenon called "cold shock". This induces a number of physiological changes in the fishs metabolism and also in its behaviour and can lead to death. The first paper cites some reasons in table 1: Brain and central nervous system response: Changes in neuronal activity Catecholamine and corticosteroid response: Release of hormones due to ...


2

The reason why the cuttlefish is colour blind is because it just has one type of cone cell. Humans have three different types, each sensitive to a different color of light. With only one cone type, you couldn’t differentiate between different colors (reference). A study was conducted in the lab of Dr Lydia M. Mäthger where two different ...


2

1) Pareas iwasakii has asymmetric mandibles. A few more examples of asymmetric snakes (reference) Pareas iwasakii skull 2) Camels have an asymmetric penis (reference) 3) You could find quite a few in this article titled Animal asymmetry Hope that helps. I am sure there are more but these are some I could find.


2

It is a torrent salamander. Most likely this is the southern torrent salamander (Rhyacotriton variegatus)


2

This is a hypothetical scenario which I think could be compared in parallel to hybrids like a mule (offspring of a male donkey and a female horse) or a hinny (offspring of a male horse and a female donkey) or zebroids (reference). In the case of the fertility of mules on wikipedia it is stated that A few female mules have produced offspring when mated ...


1

Yes, they can. Here are a couple pics I found of foxes moving their ears independently: This is something all canids can do (1)(2) Btw, I can move my ears independantly. It's all in the finding the right muscles.


1

Recent genetic analysis of human DNA shows neanderthal ancestry, so inter-species breeding to produce reproductively viable offspring (humanderthals?) appears to be possible - at least between species of the same genus. But with Homo sapiens being the only extant species in the genus Homo you'd be really stretching the boundaries of plausibility to have a ...


1

it is symi bird and more over it is commonly called as collared dove its a resident of symi and would have brought to australia by other means you can find a list off all the symi birds here


1

I think this is a Barbary dove (or Ringneck dove). See this image (from the here): More information can be found here and here. The second pages shows also images of different color variations.


1

Three factors that influence the number of legs are: 1) Sex : In some species of myriapoda, the females have been found to have more leg segments than males (reference) eg: Himantarium gabrielis 2) age Growth is by adding segments and legs with successive molts (anamorphic), and myriapods continue to add additional segments and legs after they ...


1

I wouldn't say that a human is "likely" to get sick by drinking from a puddle, I'd say "at some risk". It isn't desperately dangerous, although don't take that as a recommendation. There are many infections you can get from water (bacterial, viral, amoebal, and I presume fungal). You don't want to risk them, but probably won't actually encounter them in that ...



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