Questions tagged [zoology]

The biological study of animals. Very broad use so be sure to add additional clarifying tags

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Are there specific features of birds that cats/small predators are attracted to?

I've recently heard a podcast, in which a professor describes one of the theories as to why we like abstract art. In his talk, he mentions an experiment with seagull chicks, in which the seagull ...
Alex Stone's user avatar
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2 votes
0 answers
140 views

How did the roar evolve from snort?

When Lions roar, or Dogs show aggression, they do that snort-roar thing. They're producing sound while inhaling. How did that come to be when all (?) other forms of sound involve exhaling? Humans do ...
laggingreflex's user avatar
6 votes
3 answers
7k views

What is the fastest marine mammal?

When I did a research, most of the sources say that orca is one of the fastest. But I could not find a source that says it is actually the fastest. Some sources say that Dall's porpoises rival orcas ...
ermanen's user avatar
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3 votes
1 answer
662 views

Why are cats attracted to catnip?

According to wikipedia, the active substance is nepetalactone ($\ce{C_{10}H_{14}O_{2}}$) which has weak sedative, antispasmodic, febrifuge, and antibacterial effects in humans. Why are cats so fond of ...
Geremia's user avatar
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14 votes
3 answers
5k views

Why is Portuguese man o' war considered a colony?

The wikipedia entry on the Portuguese man o' war says: ... the Portuguese man o' war is ... not actually a single multicellular organism but a colonial organism made up of many highly specialized ...
yshavit's user avatar
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0 votes
2 answers
3k views

Why can we breathe only oxygen?

Plants has the capacity to take in both CO2 and oxygen, that's during day CO2 and at night oxygen. Why don't humans have such a capability?
Sajin Shereef's user avatar
2 votes
2 answers
301 views

Maintaining purebred pedigrees and how to lessen chance of getting disease?

Many breeds of dogs are known for a high incidence of genetic disorders. German shepherd and Saint Bernard dogs are predisposed to developing a crippling condition called hip dysplasia. Q: What ...
user3175999's user avatar
26 votes
3 answers
39k views

Are humans the only animal that requires "clean water"?

I've seen a number of animals - dogs, cats, squirrels, ducks and geese, etc drink from puddles, some of them were muddy, others had green flora growing under water. Same goes for lakes and rivers. A ...
Alex Stone's user avatar
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4 votes
1 answer
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Sexual selection in cats or other animals

I was wondering if you could answer some of my questions regarding sexual selection in cats (or any other animals). I would like to apologize beforehand for my incorrect term use. When it comes to ...
Banana's user avatar
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1 vote
1 answer
226 views

Are these bat social calls? [duplicate]

I'm currently researching bat social calls (not echolocation calls) and have been given a series of samples (in .wav format) and wanted to know if what I can hear is actually the social calls. Below ...
Phorce's user avatar
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8 votes
3 answers
814 views

Identification of this spider?

I find these in forests in Oregon, western half, though they're probably on the eastern half as well. They live under pieces of wood and bark, and have a small web across the ground. Mine will eat ...
Tzacol's user avatar
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1 vote
1 answer
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Clownfishes and Sea anemones

Relation between clownfishes and sea anemones is a classic example of mutualism. I wanted to list the species of sea anemones that are involved in this mutualism but I got lost.. Could you help me ...
Remi.b's user avatar
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11 votes
1 answer
513 views

Dogs bark at familiar person in Santa costume. Why? Don't dogs trust smell over vision?

Last night 10 humans and 2 dogs spent Christmas together. At some point, one human dissappears for a few minutes and comes back wearing a full Santa outfit. Upon respawning, the dogs start barking ...
user2811095's user avatar
2 votes
1 answer
311 views

Can pets catch the cold?

Last night I was drying my cat with a towel after shenanigans in the rain and she sneezed! Questions Can cats/dogs/hamsters or other pets catch the cold? How quickly do they recover?
hello_there_andy's user avatar
4 votes
2 answers
686 views

The least complex animals with ability to dream

People can dream, dogs can dream, cats probably too when they are sleeping. What about other creatures? Can a bird dream? Do rats have dreams? Are there any studies about that kind of thing? What ...
Derfder's user avatar
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4 votes
1 answer
3k views

What are the visual, behavioral similarities and differences between Yellow Fever Mosquito (Aedes aegypti) and the Tiger Mosquito (Aedes albopictus)?

The Tiger and Yellow Fever Mosquito visually look very similar. Recognizing the difference is important for tracking and controlling the spread of Yellow Fever, Dengue fever and other diseases. ...
Gabriel Fair's user avatar
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2 votes
1 answer
10k views

Excretion of various wastes and water requirement

A common fact is that Ammonia, Urea and Uric acid are the most common excreted metabolites and their removal needs varying amount of water, highest for ammonia (hence suited only for aquatic animals) ...
stochastic13's user avatar
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2 votes
0 answers
168 views

Organisms with the most extreme sensory capabilities? (sight, smell, sound) [closed]

Background It is quite mind boggling to imagine what it would be like to be missing sight, sound, touch, smell, taste etc. Question Which organism holds the record for most extreme sensory limits ...
hello_there_andy's user avatar
7 votes
2 answers
21k views

The number of nipples (breasts) a species has?

Only mammals have mammaries and mammary glands. What evolutionary factors determines the number of mammaries (nipples/teats/breasts) a species has? Is it always an even number?
hello_there_andy's user avatar
2 votes
1 answer
44k views

Cats, Dogs and Bears - how are they related?

What is the ancestral relationship between cats, dogs and bears? I presume they are more closely related to one another than other paraphyletic clades of mammal. Which came first? What did their ...
hello_there_andy's user avatar
15 votes
3 answers
1k views

Do animals suffer from "Human" mental disorders?

It is tragic, but apparently Killer whales and Dolphins can commit suicide too (e.g. here)... This suggests they can become depressed. I wondered whether they were "clinically" depressed like many ...
hello_there_andy's user avatar
6 votes
1 answer
978 views

Body size, what are the evolutionary trade-offs?

Background Considering just the "Kingdom Animalia" branch of organisms. It is clear that bigger does not necessarily mean better - there is large variation in body size... From the 94 µm long ...
hello_there_andy's user avatar
5 votes
1 answer
3k views

Can anyone identify this caterpillar / cocoon?

This insect is about 0.5 mm in length, so it is very small. It doesn't have legs I don't believe, I am not too good at this but I don't know if it's a worm or more like a cocoon for something. I do ...
stross_relief's user avatar
6 votes
3 answers
10k views

Are these cats calico?

Calico cats are cats that have 3 fur colors and are always female or males two X chromosomes. I've seen many cats that will have 2 fur colors (one of them is usually white) and another, third, color ...
SIMEL's user avatar
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-1 votes
1 answer
2k views

What are the universal laws of Nature concerning animals' behaviour? [closed]

I'm looking for very old (centuries) treaty or recent (20 & 21th century) research that state what some of the laws of Nature are, particularly concerning wild animals' behaviour. Such as; every ...
WaterBearer's user avatar
3 votes
2 answers
6k views

What species is this rabbit-like animal?

This image was included in something I was browsing through. It reminds me of my lion head rabbit, but the head shape doesn't match. Is this some kind of Siberian wild rabbit?
user avatar
3 votes
1 answer
198 views

Niche overlap Index

I wanted to use the compana() function from the adehabitat package in R. I don't really understand the meaning of the data in ...
Remi.b's user avatar
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17 votes
2 answers
1k views

A weird-looking fish with a shield

I found this photo in a local news page. The page claims that this fish is a new species that was found by a Malaysian fisherman. Is this true or is it a known fish and already has a name?
user avatar
2 votes
1 answer
5k views

Do bigger animals have more testosterone?

I was wondering the other day outside, thinking about varieties of species and their aggression levels, etc. I had a theory that since these highly aggressive, powerful, and viciously advantageous ...
m winston's user avatar
20 votes
2 answers
1k views

Transitivity of Species Definitions

There are many definitions of "species" which usually take the form Two individuals are of the same species if ... An implied (rarely made explicit) property of any sensible species ...
user avatar
1 vote
1 answer
962 views

Function of carapace

Majority of crustacean larvae have expanded carapace drawn out into processes as an adaptation for : a. Protection from enemies b. Planktonic habit The answer given is b but I think it should be (a)...
user4058's user avatar
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1 vote
1 answer
448 views

Why would the Camargue horses have a white coat while the foal have a dark coat?

The current issue of the magazine Lonely Planet India(Oct 2013) presents a photo of Camargue Horses which are white coated and mentions that they are born with dark hair. A search shows that the foal ...
Ram Manohar M's user avatar
4 votes
1 answer
399 views

Will a garter snake eat unusual prey if made to smell like something normal?

I have noticed that my garter snake only eats after it has smelled it's prey to make sure it is a slug, and it doesn't matter whether it's moving or not. If I were to coat, say, a caterpillar with ...
Tzacol's user avatar
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5 votes
1 answer
224 views

Identification of this Salamander

This salamander was found in a small forest pond somewhat near the Oregon coast. In the area are many rough skinned newts and a small number of another type of salamander that I still can't find the ...
Tzacol's user avatar
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3 votes
1 answer
312 views

Fear in elephants

It has been noted that elephants trained for war, as was done occasionally in earlier times, have still shown a tendency to panic in battle much more often when compared to a war horse trained for the ...
Southpaw Hare's user avatar
3 votes
1 answer
6k views

Why are urban birds still scared of humans?

I understand that animals are naturally scared of humans because we basically slaughtered every living thing we found in our way for millennia. How long does it take for them to genetically 'forget' ...
Isopycnal Oscillation's user avatar
2 votes
1 answer
85 views

Can a chicken's lard become liquid depending on its diet?

On Cooking.se, somebody asked a question about the fat in chicken stock sometimes being liquid and sometimes solid once the stock has cooled. The only answer until now suggests that the difference is ...
rumtscho's user avatar
  • 3,354
2 votes
0 answers
59 views

What's behind the amazing colour combinations in pests & insects?

What's behind the amazing colour combinations in pests & insects ? Do this colour combination signals any character/ poison of the pest/insect ?
S.Sunil's user avatar
  • 369
4 votes
0 answers
716 views

how much grass does a sheep eat in square meters per day? [closed]

I want to buy some sheeps in order to eat my garden's grass. How much grass does a sheep eat each day ??
sheep's user avatar
  • 41
2 votes
0 answers
192 views

Where are the gastralia (stomach ribs) attached?

Crocodiles and some dinosaurs have a second set of ribs between the sternum and pelvis called gastralia. Where are the gastralia attached to the rest of the skeleton?
Anna's user avatar
  • 121
16 votes
4 answers
27k views

Why do we have no enzyme to digest cellulose?

As we know, cellulose is the most abundant polysaccharide in nature. Why don't we have an enzyme to digest cellulose?
Sagar's user avatar
  • 177
4 votes
1 answer
92 views

Does sleep duration vary for animals based on time of the year?

I'm interested in the sleep patterns of wild animals, that still use sun for controlling their biological clock. Animals entrain their biological clock to the day/night cycle using light as the ...
Alex Stone's user avatar
  • 6,517
4 votes
2 answers
1k views

What animal's lower eye lid moves to upper one when closing eyes?

I know cock's lower eye lids moves to meet the upper one when it closes its eye. What other animals does this? BTW, "cock-eyed" can mean upside down, I think.
qazwsx's user avatar
  • 495
5 votes
2 answers
632 views

If a dead snake reflexively attacks itself, why does it not always attack itself?

Recently there has been this video going around of a snake that had been decapitated. Its body swung around to the decapitated head and the head attacked the body on "reflex". Now we know that most ...
Michael Papile's user avatar
12 votes
2 answers
9k views

Do animals get sick from eating dirty food or eating off the floor?

Humans have very strict tradition of hygiene, such as washing hands before eating, using utensils, and in general keeping as much distance between food and dirt as possible. At the same time, most ...
Alex Stone's user avatar
  • 6,517
4 votes
1 answer
238 views

Green feather-like formations in tap water - what is it? (with pictures)

These things recently appeared in my tap water Copenhagen Denmark, this summer 2013. They are very small, and have a feather like structure. I've called the water supply, and they thought that it was ...
Rasmus Larsen's user avatar
3 votes
1 answer
735 views

What kind of insect is this?

Found in Russia in the kitchen. It is about 3 mm long.
Sunny Reborn Pony's user avatar
1 vote
1 answer
764 views

Raphide toxicity in Pothos plant

Recently I found out that the common houseplant Pothos (Epipremnum aureum) is toxic to cats and dogs due to the presence of "insoluble raphides." I have a lot of these plants around my house and my ...
Emi Matro's user avatar
  • 205
8 votes
2 answers
1k views

Goats are so fearless but sheep are not. Is there any genetic difference responsible?

As you see in the picture goats (not only wild goats) are so fearless, but I never saw any sheep do this. What is the source of this difference in behavior?
MySky's user avatar
  • 2,264
3 votes
1 answer
2k views

Is there a difference between pig and cow anatomy that makes religious slaughter of the latter less painful?

This question is not for the squeamish. I was told that non-Kosher animals like pigs have a different anatomy in their neck compared to kosher animals like cows such that the Shechita method of ...
A L's user avatar
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