The biological study of animals.

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How can bats hear such high frequencies?

I attended a talk that glossed over some biology as it was talking about a certain protein. The speaker mentioned humans can hear up to, often less than 20kHz frequencies, whereas bats can hear up to ...
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0answers
10 views

Which taxonomic classification schemes are most accepted?

Since the taxonomic classification schemes followed by universities around the world are different I wish to know which are the most accepted classification schemes till date concerning the following ...
3
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0answers
38 views

How many animal species are larger than humans? [on hold]

I sometimes think about just how huge humans are in comparison to most animals. Even compared to a squirrel, which is really a pretty large organism in the grand scheme of things, humans are hulking ...
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5answers
250 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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1answer
59 views

How are smell and taste in fish differentiated?

The senses of taste and smell in different fish classes are described as two distinct senses; smell is mediated by the nasal openings, and taste by epithelial taste buds. They are both forms of ...
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1answer
897 views

What is this droplet of liquid that comes out of a mosquito?

I have been looking at pictures of different species of mosquito and several times I came across pictures where the mosquito seems to be secreting some kind of fluid. In the pictures one can clearly ...
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1answer
40 views

Animal identification (larva)

I found a tiny, white animal in my mouth on the morning of June 28, 2015, in Toronto, Ontario. Luckily I don't seem to have hurt it. I was eating some sunflower and pumpkin seeds at the time. I ...
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1answer
375 views

Toronto spider identification

I found it in Toronto, Ontario, during early June, 2015. When prodded it seemed to jump around, or at least to move very fast. I can also post a short video of it if needed.
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0answers
25 views

Can a lizard shed a regrown tail again?

Some lizards are famous for their ability to voluntarily shed their tail to elude predators (Autotomy). After a while, the tail will be regenerated, though with slightly different qualities, as ...
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0answers
38 views

Can Kit fox and Red fox produce offspring?

Can a Kit fox (Vulpes macrotis) and a Red fox (Vulpes vulpes) together produce offspring? Would such a hybrid be fertile?
8
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1answer
110 views

Identify this caterpillar

Could anyone try to help identify this caterpillar, there are loads of them all over my garden and I've got three of them in a makeshift caterpillar house. I've had them for about a week and they've ...
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2answers
8k views

Can all mammals swim?

When I checked it seemed trivial to answer: yes, all mammals can swim. But research on the internet provided different information. I found: people and primates cannot swim, but can be taught how to ...
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0answers
37 views

Best tail for swimming?

I understand that the vertical tails of fish and the horizontal flukes of cetaceans evolved due to the spinal movements of their ancestors but I was just wondering which was the most efficient for ...
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3answers
7k views

Why is it that cats can jump so high for their size, compared with humans?

My cat is about 1' high at the shoulder, and I am a little over 6', but my cat can easily jump onto something as high as I am. That is 6x it's height. If a cat can do this, then Why can't I jump up ...
9
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1answer
242 views

Why does the sex of the parent species determines the species of a hybrid offspring

I've read a little about hybrid animals, and have been amazed by the fact that the sex of the parent species determine the species of the offspring, in some hybrids. A male horse and a female donkey ...
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0answers
20 views

List of non-native terrestrial molluscs in California?

I'm looking for a list of non-native terrestrial molluscs in California. Ideally, I also need the date each taxon was introduced into California. Can anyone help?
7
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1answer
278 views
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1answer
522 views

What is this beetle and what are the strange antennae for?

I found this wonderful creature in my yard (I live in the south of France) last night: It was about 2-3cm long, with a hard carapace and wings. It also made loud hissing noises when agitated. I ...
7
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1answer
573 views

Why do pigeons kill their chicks when touched by a human?

I used to have many pigeons around the house. If by chance one of the chicks fell out of the nest, we used to put it back using gloves. Usually, if we would touch the chicks with our bare hands, ...
9
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2answers
309 views

What kind of bird species is this?

Every now and then I got a glimpse of this bird which I'm pretty sure is not native to Northern Germany where I live. There are at least three of these birds around but I usually only see something ...
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0answers
135 views

Was the recent “conservation hunt” of a black rhino supported by science?

CNN recently covered a sanctioned black rhino hunt in Namibia by Texan Corey Knowlton, who bid US$350,000 for the license. In the story, he claims that the hunt was actually supporting conservation of ...
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3answers
2k 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 ...
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2answers
104 views

Can carnivores survive on a (processed) vegetarian diet? Why or why not?

There are many differences in for example the digestive system between carnivores, herbivores and omnivores. It seems that in certain kinds of species adaptability with respect to diet is possible. ...
8
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2answers
886 views

What kind of beetle is this?

I live in Denmark, Europe and I found this insect wandering around in my garden the other day. It's some kind of beetle but i dont know what kind it is or the species. The beetle could also fly and ...
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2answers
85 views

Why do insects avoid being on their back?

I have noticed that when insects are placed on their backs, they tend to turn themselves over quickly or else appear to be in distress. Is there a physiologic, anatomic, or adaptive reason why supine ...
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2answers
121 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 ...
4
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1answer
20 views

How do Mockingbirds find each other during mating season?

Since mockingbirds imitate songs of other birds, how do they find each other during mating season? How can they tell it's a mockingbird singing, instead of other birds? Is there something in their ...
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2answers
169 views

What's the name of this caterpillar?

It was found in the state of Virginia, on the east coast of the United States.
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1answer
50 views

What species does this moth belong to?

It was found a few days ago in the state of Virginia, on the east coast of the United States.
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1answer
78 views

What's the name of this beetle?

I found him in a kitchen located in Toronto, Ontario, Canada.
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1answer
85 views

Why do these earthworms stay between the road lines?

This article shows pictures of earthworms during floods in Texas. The worms ball up, supposedly in order to survive the floods. Can anyone explain the phenomenon a little? I can't seem to find ...
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4answers
2k views

Why do smaller mammals move intermittently?

I was watching a nice little video on youtube but couldn't help but notice how snappy smaller animals such as rats and chipmunks move. By snappy I mean how the animal moves in almost discrete states ...
14
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1answer
192 views

Do species other than humans have distinct daily feeding patterns?

I have a general interest in complex adaptive systems and I have found that nature and the organisms within it is a perfect natural case of a rich adaptive system with a lot of possibilities for ...
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1answer
54 views

Consuming animals by slaughtering vs injecting barbiturates?

In "Least painful way to die" we get an answer ... Companion animals (e.g., dogs and cats): injected barbiturates are recommended Laboratory animals (e.g., mice and rats): injected ...
5
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1answer
59 views

Zoology - Help identify the kind of spider

Yesterday, I bought a banana tree (Musa Basjoo) from a local supermarket. Today, I noticed a hive of small spiders on the tree. I do not know where they came from, so I am curious to identify these ...
4
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2answers
131 views

Do animals exist which have great vision, but see only grayscale?

In computer vision the color information is often discarded, as most object recognition tasks seem to work just as well on the greyscale image (even better, because there is less unnecessary ...
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3answers
366 views

How is the blood volume of a living organism measured without killing it?

How is the blood-volume of an organism measured without killing it? Note:The blood-volume of an organism is defined as the total volume of blood present inside that organism.
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1answer
109 views

What is the convention for log notation in biology?

I'm reading through some oldish (1980s) papers on length-weight relationships in fish and crustaceans. Many report log-log relationships without specifying whether this is natural log, base 10, etc. ...
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2answers
56 views

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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1answer
58 views

Why are Oxyuranus snake species named Taipan?

It is interesting, why are Oxyuranus species called Taipan. The snakes are Australian but taipan looks like of Chinese origin word (it means big shot - important person).
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1answer
24 views

Are there fish with a double circulatory system?

Our courseware materials say there are such fish, but the internet suggests fish only have a single circulatory system. Thanks!
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3answers
62 views

How animals know which is carnivorous and herbivorous?

Deer ran away from tiger or cheetah, but not from giraffe or zebra. where did deer learn this? How animals know which is carnivorous and herbivorous?
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1answer
43 views

Limited space for animals - how is that bad?

I am writing an English paper wherein I have to appeal for change in the way humans treat wildlife. I was initially given a situation wherein I took a ferry in a certain area and saw a dead baby ...
8
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2answers
446 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 ...
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1answer
95 views

Does the DNA of a tadpole change after it becomes a frog?

Does the DNA of a tadpole change after it becomes a frog? In other words what changes take place as a tadpole becomes a frog, and does this metamorphosis affect the DNA in any way? I would appreciate ...
14
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4answers
3k views

Why do parasites sometimes kill their hosts?

It's bothered me for a while now. I understand why a parasitoid would do this, as it only temporarily requires the host, and that not all parasites kill their hosts. There seems to be no evolutionary ...
3
votes
1answer
73 views

Human bone density and Brown Bear bone density?

It is stated on this website that the density of a Grizzly bear bone is ten times our own. And since I am not into biology at all, I am confused as I don't understand the meaning of bone density here. ...
26
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1answer
2k views

Why do ants live so long?

I was surprised to learn that worker ants in some species live many years. I would have expected a lifespan of a few weeks or months (which is apparently the case for many species). What factors ...
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2answers
435 views

Did cats evolve from monkeys ? or vice versa?

Did cats evolve from monkeys ? or vice versa ? How similar are the genes of cats and monkeys ? What is the proof that they are related or that they are not related ? Most monkeys climb in trees and ...
0
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1answer
40 views

Do “non-human” animal like cat, dog, bird or fish think about future while sleeping? [closed]

I don't think "non-human" animal like cat, dog, bird or fish think about future while sleeping. I think when sleeping, the "non-human" animal will feel rather think about anything. I think when ...