The biological study of animals.

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How are chickens affected by light?

When I was young, I was told never to put a fluorescent light in a hen house because it continuously turns on and off. Extra lighting is used, as far as I know, to 'extend' a chicken's day. Human eyes ...
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54 views

About the plight of Elephants and efforts to conserve them? [closed]

Poachers are only after the ivory horns right? I read this story from the New York Times ( I think) of saving a Rhinocerous by some Park Rangers and a Vet. ( forgive spelling) ; they tranquilized the ...
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14 views

Book-recommendation: Economic Zoology

I need to have a book which covers following topics two may also be fine: (a) Apiculture, sericulture, lac culture, carp culture, pearl culture, prawn culture, vermiculture. (b) Major infectious ...
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30 views

What insect is this on the photos?

What insect is this on these photos? Found in Russia in the living room.
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29 views

Why are there no animals with a length greater than 30-40 meters or with a mass greater than 200 tonnes?

The biggest and heaviest aquatic animal is the blue whale: 30 meters long and a mass of 200 tonnes. The biggest and heaviest terrestrial animal was a Sauropod (plant-eating, long-necked dinosaur): 40 ...
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59 views

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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29 views

What is this animal? A worm which make round hole in on the ground [closed]

From South East Asia. There are some (perfect) round small hole in my garden (d=0,3 cm). They are the home of a small, strange worm, which I can't know the name. When I put an bamboo young leaf (used ...
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1answer
39 views

Book-recommendation: Ethology

I am looking for a book that covers the following topics in ethology: Behaviour Sensory filtering, reponsive-ness, sign stimuli, learning and memory, instinct, habituation, conditioning, ...
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62 views

Why do small organisms make faster movements than big organisms?

I hesitated to ask this question because it seems so obvious and intuitive. However, I am not able to explain this tendency. Background It seems to me that small organisms make faster movements than ...
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54 views

How do animals handle light refraction in different media?

For a human, when diving underwater, everything is blurry because of the water's different refractive index compared to that of air, which we are accustomed to. How do animals, like turtles, seals or ...
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14 views

Which trees/shrubs provide most food for wildlife in northeastern US?

Let's say I have an opportunity to plant a couple trees or shrubs in my backyard that is adjacent to a small 20 acre area of woodland surrounded by urban development. There are animals like rabbits, ...
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26 views

Regarding the kingdom Animalia, which phylogenic tree is more common: Molecular Comparisons or Body-Plan Grades

In the picture below, which I obviously do not own: it depicts two different phylogenic trees, one which is based on molecular comparisons and another one which is based on body-plan grades. My ...
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44 views

What is this woodlouse doing?

I picked an apple from the ground, it was wet with dew and a woodlouse was stuck to it, with its back against the apple. When it got loose, it started flexing its "tail" like this for a while. Why?
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21 views

What are scientifically recommended safe substances for cockroach extermination?

What are some easily/readily available substances that have been scientifically proven to exterminate cockroaches? Moreover, what are the scientifically sanctioned, effective procedures? (There are ...
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1answer
43 views

Cross-integration of puma subspecies populations

A major concern of conservationists in south Florida is the population of native Pumas, the Florida Panther. Until recently, it was thought that the Pumas were a genetically distinct subspecies, ...
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1answer
81 views

How do animals lose heat?

I remember being told as a child that dogs stick their tongue out to stay cool, because they can't sweat like us. This made sense to me. But only a couple of days ago I suddenly thought: What about ...
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2answers
1k views

Why does the bunny have a white butt?

There are several species of plant eaters that have a very visible bright white behind: several kinds of deer, rabbits, antelopes, etc. Does this white spot have any function to it, or is it purely ...
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103 views

Can ants sense food from a long distance?

I recently had ants find and then swarm to a food container that I put down on a desk, and I'm curious as to whether an ant would have needed to get lucky, discovering the food after crawling up the ...
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2answers
40 views

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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3answers
86 views

What is the smallest scale at which blood vessels, nerves and other structures are deterministic?

Super simple question, but I can't find the answer on the Internet (and I'm in a foreign country so the library is not English.) As the title says, what is the smallest scale at which blood vessels, ...
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1answer
26 views

Do snail shells increase the number of rounds with age?

Do snail shells increase the number of rounds with snail age?
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1answer
656 views

Is there any relationship between heartbeat rate and life span of an animal?

Is there any relationship between heartbeat rate and life span of an animal? Do they belong to a cause-and-effect relationship or are they both caused by some phenomenons or a common cause?
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1answer
620 views

Help me Identify this Spider

This red spider has set up a web in my yard, in South Eastern, Texas, United States: The spider itself is about an inch long (2.5 cm), and is predominantly red to brown in color, with red legs, and ...
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2answers
56 views

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 was the cama's life expectancy computed?

A cama is a hybrid between a male dromedary camel and a female llama. The first cama was born on January 14, 1998, yet on the Wikipedia page it is said that a cama's life span is 30–40 years. How was ...
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35 views

What fraction of biomass is cultivated by humans? Have we increased the number of large animals?

What fraction of "large animals" are domesticated by humans, compared to those who are wild? I mean cows, pigs, sheep, horses, dogs, cats in relation to comparable wild animals. Different measurements ...
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47 views

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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216 views

Why do humans seem so much more prone to disease than animals? [closed]

It seems like when we observe animals in the wild, the occurrence of noticeable disease in adult individuals is much lower than in humans. Why? There are a number of reasons that this could happen, ...
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320 views

What kind of skull is this?

We found this skull on a beach in southwestern Sweden, and are curious as to what kind of animal it was.
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223 views

Why Other Pigeons kill the baby if touched by human?

I used to have too many pigeons in house. If by chance one of the baby falls out of the nest we used to put it back using gloves. Usually, if we touch them with bare hands, the other pigeons usually ...
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1answer
90 views

Why are there so many sex determining systems in animals

There are several sex determining systems in animals. In mammals XY = male(except in rare cases where SRY crosses with genes on the X so that it is the reverse) and XX = female. In some birds it is ...
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814 views

Facultative Cannibalism?

I heard about Larger cats eating the cubs. Is it some kind of facultative cannibalism or they can eat there own kind like that? What are the facultative cannibalism present in animal kingdom? What ...
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1answer
33 views

Where do flies go?

Where are flies attracted most? Apart from food odours, of course. Why do they seem to be attracted by hot and humid places? Do they prefer shades or light? Why do they tend to get inside very easily? ...
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85 views

How do ants know where they are going without eyes? [closed]

I know that ants have some sense of direction, but what is the physiology behind this sense?
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50 views

Can foxes move their ears independently?

I've read that dogs can do move their ears independently, i.e., point one ear in the direction of a sound without having to point the other one at the same time. Is this a common trait with other ...
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1answer
205 views

Identify this Harvestman

I spotted this guy in Switzerland. It's clearly an Opilione (Harvestman), but I really know nearly enough about this diverse group to be able to identify the species. Sorry, I didn't think to ...
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1answer
70 views

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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2answers
43 views

Is there any possible way that hybrids can mate?

I'm writing a book, and a a portion of it involves a society of humanzees. Now, is there any plausible way that a hybrid (such as a humanzee) could procreate either with one another, or with their ...
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How does a woodpecker not give itself concussions?

How does a woodpecker go about smacking it's head into a tree without killing itself?
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57 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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3answers
132 views

Theoretically, is domestication of (virtually) any animal possible?

Looking at ones that manage well alongside us human animals, such as dogs and cats, we see that this is possible for evolved, distant animals to have heritable, preferable traits around people. ...
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184 views

Species of this White Dove

I visited a bird enclosure close to where I live in Australia. The enclosure had several different species. The birds that stood out most were these doves sitting right along the fence railing, making ...
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1answer
116 views

How does the Cuttlefish camouflage itself accurately despite being color-blind?

I have seen/read that the Cuttlefish is able to camouflage itself extremely accurately. I have also seen/read that they are completely color-blind, though see with very high contrast. How does the ...
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1answer
107 views

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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1answer
43 views

Which of the following demonstrates the pattern of development in Greylag Geese?

Which of the following demonstrates the pattern of development in Greylag Geese? {Please give specific answers, which among the following gives the best available demonstration?, If needed, have a ...
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1answer
90 views

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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2answers
90 views

What's the smallest organism that can produce voice?

What's the smallest organism (animal, insect, or any living creature) that can produce voice. And not just make sound, but has an organ to specifically to create sound, like how us mamals have vocal ...
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2answers
304 views

Which organs do cats not eat on their prey?

My female cat is a very active hunter and brings me her prey daily. Except for shrews and birds, she always eats them entirely. This afternoon she brought me this: It was quite large (maybe ...
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2answers
59 views

Has an artificial symbiotic relationship ever been created?

Have 2 organisms ever been introduced to create a symbiotic relationship that doesn't occur in their natural environment?
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73 views

Why are hens so different from other birds? [closed]

Hens lay many eggs during their lifetime (at least, I don't know of one which can lay more eggs) and they can't fly. Compared to other domestic animals it seems to me they are the least capable of ...