The biological study of animals.

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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 ...
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Has synthetic biology created new plants or animals as of 2013?

I've seen a Ted.com talk where the speaker suggests that modern science can create new micro organisms, like bacteria with a pre- defined new set of traits. But has anyone create a new species of ...
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Identifying internal structures of dissected fish

Note : Images displayed below might be disturbing to some people. I have dissected a fish for the first time ! I have some idea of what some of the structures might be but I am not sure and so would ...
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Book recommendation on selective breeding?

I am looking for a good book that gives a nice overview of the science and technics of selective breeding. I am particularly interested in the use of population genetics to support decision in this ...
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353 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 ...
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How diverse are dogs in their traits other than appearance?

I've asked this question about dogs not so long ago, and the short answer was - dogs are the most diverse looking species of mammals because they got a small number of genes that have a big impact on ...
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Is there such thing as “biological cycles” of activity/performance/etc in mammals?

I'm looking for some information about the cycles of increased/decreased activity, mental performance or endurance that are related to a mammal's age and the time of a season. First of all, I'm not ...
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275 views

Why apes started to contemplate and become altruistic? [closed]

I was asking this first on philosophy forums, but it is suggested, that answer could be found from evolutionary view of point, so here we go: Again my question raised when thinking of myths, their ...
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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 ??
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Why do ants dig surface paths?

A few days ago I observed a corridor built and used by ants that went over a path in fields: Why do they build it? It seems it doesn't bring any considerable protection from the surrounding ...
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Help with designing the analysis of radio telemetry study [closed]

I was wondering if there are any spatial ecologists out there who can provide some insight on the trouble I'm having with my Masters research. I am looking at the association a bat species to high ...
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Laying eggs vs giving birth: is there a connection with internal vs. external ears?

I have heard that "The animals who have their 'EARS' outside their body give birth to their young ones and the animals who have their 'EARS' inside their body lay eggs." Is this true? Are there ...
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What organs are absolutely needed by the human body?

The title is my question: what organs are absolutely needed (fatal if injured/removed) by the human body and perhaps animals in general? I'm not asking which organs are mechanically replaceable, but ...
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What insect is in this photo?

Found in Russia, in the kitchen. It is about 1–2 cm length.
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Can someone identify this bird?

We recently found a nest in the back garden and a little bird inside. Can you help us identify it? The nest is quite small like the bird so we are wondering whether this is the parent or a baby chick. ...
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260 views

How can we know or measure pain in animals?

Is there any standard way to know how much pain an animal feels when it gets hurt like when a bird loses it's wing or hen when killed etc. All pain sensation points? Hey I'm new to biology. :)
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What does this Barbary Macaque facial expression mean?

A girl pretended having a piece of food in her hand and pointed it to a Barbary Macaque in Gibraltar. As a response he made this facial expression to her. What does this mean?
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How to know if a woman is fertile without actually making her pregnant?

How to know if a human female is fertile (can give birth to child in future) without making her pregnant? Any signs, tests?
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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' ...
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What kind of insect is this?

Found in Russia in the kitchen. It is about 3 mm long.
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List of species recently found of economic value

Is there a website or organization cataloging lists of biological species to have been recently found of great economic value? For example, a plant that wasn't of economic relevance a while ago but ...
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Where I can find information about the study of animal vision?

I read a lot of articles on the internet about how dog see the the world. But I can't find the source of these study. I want to know how did scientist setup the experiment to find out animal vision. I ...
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What is the difference between these terms: clade, monophyletic group and taxon?

Wikipedia definitions for these terms are pretty similar: http://en.wikipedia.org/wiki/Clade http://en.wikipedia.org/wiki/Monophyletic_group http://en.wikipedia.org/wiki/Taxon They sound like the ...
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Can songbirds mimic car alarm sounds?

A silly question. A few days ago I observed a very vocal bird with impressive vocal variety. It was rapidly switching from one tune to the next. After sometime I realized that the bird might be ...
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915 views

Do male marsupials have a pouch?

Do male marsupials have a pouch, or is it a female organ only (like the womb)?
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What kind of arthropod/animal is this?

Can anyone identify this strange creature? I live in a very urban part of Montreal, Canada. It wasn't moving (seemed dead) and although the image is huge, it wasn't as big as it seems (a couple of ...
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Why do people and animals stretch out their bodies and what is causing this behaviour?

I noticed that my cat which is only 6 months old has started stretching its body from time to time. Then I thought that this motion doesn't seem very natural from another cat's viewpoint, so my cat ...
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649 views

Why does temperature shock kill fish?

As is advised with most fish you should avoid sudden changes in water temperature (for example by introducing new water that hasn't been left to come to room temperature). I have, however, never ...
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What Aquatic Mammal has no Tail?

Found in a waterway in Butte County, CA. First thought it was a beaver kit, but it has no tail. What aquatic mammal has no tail?
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Are Night Parrots (Pezoporus occidentalis) really extinct?

This incredibly rare animal has been reported to be extinct since 1990, however several cases has been raised that night parrot was spotted in the areas of Australia. What is the cause of their ...
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Aside from cockroaches and other insects, which species (of all kinds) are 'immune' to ionizing radiation?

I have just been reading this excellent question and answer about cockroaches ability to withstand ionizing radiation. My question is an extension of that question: aside from insects, which other ...
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671 views

General undergraduate zoology textbook recommendation?

I am very interested in zoology,and I want to study zoology in my spare time. Any undergraduate level zoology text book recommendation?
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What would it take to recognize a deer by its photo?

I am trying to recognize a deer by its antlers or any other means. Elaborating: I was hoping to use their antlers to recognize them but I have heard that most deers shed their antlers every year so ...
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Does cockroach lay eggs in human flesh when they “bite”?

Recently, i have "bite" by cockroach, not only the "bitten" area red and swallowing, and more specificly, it have a big hole in that area, when i clean it with hydrogen peroxide solution, something is ...
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Can anyone identify the worm in this video clip?

My wife came across this youtube clip of a spider and a worm. Can anyone identify at least the phylum?
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To what extent do domestic animals understand language?

Note: Please tell me to re-post this in Cogsci or pets if this doesn't belong here. Hello All, I want to know how dogs or other domesticated animals differentiate between normal chat and a command. ...
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Do cockroaches eat their shells after moulting?

I recently witnessed a cockroach eat its shell after it moulted. Do cockroaches always do this?
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Diet of free-range herbivores

Giving minimal credence to estimates in popular media of the average biomass of insects/arachnids, etc. in an acre of land, it seems that a "free-range" cow (I don't mean to pick on cows) might be ...
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Mosquito physics

What are the environmental limitations of mosquitos I should know of if I want to avoid getting bitten? For example: How fast should I walk in order to be moving too fast for one to bite me? Can a ...
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Detailed mechanism of the cause of diabetes mellitus type 1?

I have read in some texts that diabetes mellitus type 1 is caused by degeneration of beta cells due to our body's own immune reaction.Is it true? Can you explain further how are such types of immune ...
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Why did many odd-toed ungulates become extinct?

There were a lot of odd-toed ungulate animals in the ancient times but now just few of them survived. What is the reason for that?
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What is the scientific and common name of this bug?

Captured this under my stereo microscope. Much beautiful than appearing on my camera sensor. Can someone help me identify it and explore more? Also is it having a compound eye ?
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Leaves not liked by herbivores

I at times have many goats grazing in our locality. Recently a few cows were seen too. I just offered one of the cows a few leaves from Jasminum sambac plant growing in our garden. The cow smelled and ...
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List of Asymmetric Animals

The (male) Fiddler Crab is a famous example of an animal whose morphology exhibits neither mirror nor radial symmetry: (Image source) List of animals featuring external asymmetry is a Wikipedia ...
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translation of scientific names [closed]

I am trying to determine the "translated" meanings (not seeking the common names) of different insects, (presently some bees and wasps). Does anyone know of a printed or internet resource that ...
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297 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. ...
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509 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) ...
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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 ...
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339 views

How do pet gecko lizards pose a health risk?

Does having gecko lizards living in your house pose any health risk?
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By What Mechanism can Felines Reverse Diabetes?

To my knowledge house cats (and likely other felines) are the only animal able to go into remission after onset of Type 2 diabetes mellitus. I don't have a reference, this has been by peers in my ...