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Rika Reblogging Things

@bwusagi / bwusagi.tumblr.com

Hi, This is Rika’s reblog blog and I regret for not making this as a main artblog, tumblr pls make it a thing to change main blog.
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Not to critique evolution, but I would think orange and black stripes wouldn’t be as good for camouflage in a forest as, say, green and black would.

It turns out a lot of animals can’t see the difference between orange and green!  Elephants, for instance, have dichromatic vision (two types of cones, rather than three like most humans.) 

Check out this diagram from ResearchGate.  It deals with the color vision of horses, who are also generally dichromatic.  (I think, though I’m not sure, that zebras would have the same color vision as horses.)  See how orange and green look to them?

Not to critique evolution but I think prey animals should be better at telling when their predator is dressed like a traffic cone.

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squeeful

It doesn’t matter what zebras see, because tigers are not native to Africa and do not naturally hunt zebra.  Tigers are Asian and mostly hunt animals like deer, elk, and buffalo.  These aren’t animals with great color vision.  They don’t need to have it because they don’t eat fruit and so don’t need to know when the berry is ripe vs when it’s not.  Good color vision is too expensive to have if you don’t need it.  Deer put their vision stats in a wide field of vision that is sensitive to motion, low light capabilities, and possibly seeing UV light.  They don’t have great color and lack a lot of acuity, but have a great sense of smell and good hearing.  That’s way more useful if you’re prey.  Deer see well in the blue end of the color spectrum and less well in the red.  This makes sense because deer are most active in the dawn and dusk periods, when there is more blue in the light.  Tigers are taking advantage of deer eyesight by being orange.

We see tigers are being obviously colored because tigers are fruit colored to our tree ape brains.

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thelibrarina

I don’t know what the best part of this is: implying that deer chose their attributes on a character sheet, or the fact that we get to see tiger colors because they look like a snack.

Ok but like, I think you underestimate just how well they blend in when actually in the environment. Like, just using tigers as an example.

or how about a leopard?

It’s called ‘disruptive colouration’ because the markings help to break up the animal’s outline against the grasses or rocks. And the rosettes on leopards and jaguars? Sun spots shining through the trees and leaves on the ground.

And this is how hard it is to spot them WITH colour vision. Now imagine the above images but with the limited coloured mentioned above?

I’m sorry but there is not an animal in that first leopard picture

Are you, sure about that?

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dalashas

Also humans are an anomaly in so far as mammals go for having trichromatic vision. Most mammal groups have dichromatic vision on account of being bottlenecked into almost exclusively nocturnal niches back when dinosaurs were the main predators. Mammals kept to the dark to avoid them and then radiated after the extinction. Birds and fish have examples of way better colour vision than us.

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reblogged
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purgefails

Your blog was hacked: what to do?

If you see weird pics of ladies with dubious links posted on your blog out of the blue, here’s a step by step way of stopping this and preventing it from happening again that I think might work.

Important : this only works if you can still access your blog!

Changing your password is important, but it won’t do you any good if your hacker still has an opened session on your blog and can still access it. So the first thing you wanna do is close your hacker’s session.

For that you need to go in your blog’s settings:

image

On the new page opened, scroll all the way down. There, you can see something called “Active Sessions“. The first and oldest one (”current session” in green) should be yours, the new one should be the hacker’s session. To close your hacker’s session, click the gray X next to it.

Now that their session is closed, they can’t access your blog anymore unless they enter the password again.

So don’t lose time, go all the way back up and change your password immediately. Make also sure your hacker didn’t change your email address.

Now you should be safe from your hacker. But it won’t prevent you from getting hacked again.

If you really want to be safe from hackers, you should turn on the “Two-factor authentification” option (on the same page).

It requires you to enter your phone number, which is a bummer. But if it’s turned on, everytime you wanna log on (so not if your session is already opened, but only if you log off and try to log on again), it will send a code on your phone that you’ll have to enter (in addition to having a password).

That way if someone tries to hack you again, even if they get your password right, they won’t be able to enter your blog without having that code.

There it is. I hope it will help some of you, since I see more and more people noticing blogs being hacked

with light about the massive wave of bot-hacking i’m seeing, please do this and keep your blog and all of your personal information secure!

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Meet Corsica's New Mammal Species, The 'Cat-Fox’!

A new mammal has been identified on the French island of Corsica, looking like a cross between a cat and a fox. It is hoped that this “cat-fox"—which has been legendary amongst locals for generations—can now be formally identified. 

The large cat had been a legend in Corsica for years, before one was accidentally caught in a chicken coop in 2008 in Olcani in the north of the French island. Quoted in Metro, Chief Environmental Technician of the French Forest and Hunting Office (ONFCS), Pierre Bendetti said: 

“We believe that it’s a wild natural species which was known but not scientifically identified because it’s an extremely inconspicuous animal with nocturnal habits. The cat-fox is part of our shepherd mythology. From generation to generation, they told stories of how the forest cats would attack the udders of their ewes and goats.”

The cat is different from a normal domesticated cat in a number of small ways. It is known in Corsican as the “ghjattu volpe”, the “chat renard” in French, and the “cat-fox” in English. RFI, the French current events radio broadcaster, describes it as being longer than an average cat (measuring around 90 cms) with larger ears, longer canine teeth and a black tuft on the end of its tail. 

The centre has spent over 10 years trying to obtain more information on the animal. It used infrared traps to obtain hair, which established that the DNA of the “cat-fox” is different to the European wildcat on the continent. RFI reports that the ONCFS were then able to trap 16 of the creatures which live in the Asco Valley up to 2,500 meters above sea level.

The captured cats were tagged with electronic chips so that the centre could follow their movements; many of which have formed the basis for the study which was presented to the public this week. Benedetti’s aim is to see the species recognised and then protected.

The Corsican “cat-fox” is the latest animal to be discovered but there are other regular discoveries still being made, even in the mammal world. In 2005, a similar creature to the Corsican “cat-fox” was discovered in Borneo. In 2010, the BBC reported the discovery of a new carnivorous mongoose-like creature in Madagascar. In 2013, the first carnivorous mammal —olinguito (pronounced oh-lin-GHEE-toe)—to be found in the Americas for 35 years, was discovered in the cloud forests of Colombia and Ecuador.

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Anonymous asked:

It happened again maybe you should change your password?

I've changed my password, I don't understand how it got in again.....

This is kinda frustrating 😓

I've deleted the post....

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Anonymous asked:

Just a heads up I think your blog might have gotten hacked?? There’s suddenly posts about R-18 porn related blogs so maybe have that looked into?

Oh god yea thanks for pointing that out, deleted that post

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reblogged
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todaysbird

i really like when crows just insert themselves into a group of other birds and then act like there is absolutely nothing strange about it

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coyotes-grin
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kelbremdusk

nobody will suspect a thing

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elkian

crowto-bombing

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reblogged

“Last night a Maasai guide discovered a one of a kind genetically mutated baby zebra in the Maasai Mara and named it after his surname - Tira. This morning we were one of the first ones to visit Tira! A few years ago there was a similar case, however that zebra still maintained the stripes and brush-like tail. Tira, however, has patterns that appear as polka dots! I hope the experts will look into this case and share some interesting discoveries soon!”

Frank Liu Photography, Maasai Mara National Reserve

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reblogged

I am fucking dying

i’ve never heard such a good attenborough impression i’m rolling

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