Questions tagged [zoology]

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

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What is the basis for the craniofacial topology?

There are animals which are not directly related but have similar craniofacial topology. For example: koala, deer, mouse all have similar craniofacial topology especially noticable on baby species. It ...
Mikhail V's user avatar
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What distinguishes a colony from multicellular organism?

I would like to inquire what made biologists conclude that colonies such as the famous Volvox is an organism constituted by independent cells as opposed to a multicellular being. I read that it has ...
Jj Luntayan's user avatar
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What is the term for a missing feature in a descendant that was present in an ancestor which defines a clade?

Examples include: A snake does not have legs, but is still considered a tetrapod as it is a descendant of animals with four legs Bdelloidea (class of rotifera) can only reproduce asexually, but is ...
schajan's user avatar
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Why electrical synapses are more common in invertebrates?

I suppose it's because they live in an environment where there's a constant vulnerability to predators and they need to respond quickly. But it's not really the case for many invertebrates and besides ...
Venkatesh Choudhary's user avatar
7 votes
2 answers
2k views

Identifyication of small delicate shell found on the beach

I found this item on the beach today in north west England. It’s very light weight and delicate, about 3cm long and some interesting patterns on it. Any ideas on what it is would be greatly ...
Whiskeyqueen245 's user avatar
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What are those eggs?

What could those white dots be? Eggs of an insect? The soil was taken near a river/carrot field.
nayriz's user avatar
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1 answer
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Who put Cephalopoda in Mollusca?

Cephalopods are considered mollusks due to homologies such as a shell, a muscular foot, and a mantle. But, they also have closed circulatory systems, two giant eyes, and eight prehensile legs. When ...
imrobert's user avatar
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2 votes
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Identify caterpillar

Hi i live in the Nilgiris region of South India and I found this fellow on one of my Lemon Grass plants. About 8-10 cm long with fine hair all over. Let me know what species this could be. Thanks
Jamie's user avatar
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How to understanding the mouse strains name and differences in mouse strains used in biology

I am currently working with various mouse strains in my biological research and I am encountering some confusion regarding their nomenclature and differences. I understand that the different names ...
zhang's user avatar
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3 votes
1 answer
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What kind of Bolivian spider is this? Is it a black widow?

I found this spider near La Paz, Bolivia. I have been looking all over the internet to try and identify it, but with no luck. Could someone please help me?😁 Initially I thought that it was a black ...
Henri's user avatar
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2 votes
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How do Addax defend itself from predators?

The addax (Addax nasomaculatus) is a critically endangered antelope adapted to live in extreme desert conditions. It has long impressive horns that can potentially serve as a weapon because they are ...
Triceratops's user avatar
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How do whales swallow food underwater without drowning?

How do whales swallow food underwater without drowning? I know they have a valve that blocks the trachea while the mouth is open and that breathing is made from dorsal or parietal breathing holes or ...
Triceratops's user avatar
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Why are polar seas rich with nutrients and plankton?

It is well known that baleen whales migrate to the polar seas to feed on plankton and krill (marine crustaceans). The question why are the polar seas rich with krill and plankton? If the answer "...
Triceratops's user avatar
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-1 votes
1 answer
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Are all animals “information seeking”?

I read on Britannica that all animals down to microorganisms are "information seeking", but there was no source to back up the claim. One way to begin exploring curiosity is to understand ‘...
Hasan Zaeem's user avatar
1 vote
2 answers
170 views

What kind of spider is this (from Bangladesh)?

I just saw this spider in my bathroom. I was wondering what kind of spider is this and if it is venomous. Country: Bangladesh
syed shoeb's user avatar
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Why did the effects of the Pleistocene extinction not significantly impact African megafauna at the end of the Ice Age?"

It seems that megafauna extinctions did not have a significant impact on African megafauna at the end of the Ice Age. Humans also lived in Africa relatively commonly during the end of the Ice Age, ...
curious_mind's user avatar
11 votes
2 answers
2k views

Does interspecies breastfeeding occur in the wild?

Does interspecies breastfeeding occur in the wild? Say, for example, a zebra feeding a wildebeest, or a bushbuck feeding a gazelle. There is a Wikipedia page on this topic but it only shows animal-...
Samid's user avatar
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-1 votes
1 answer
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Which predator / prey pair of species have the most drastically different body size?

I'm trying to identify which 2 species, one predator species and one prey species that have the biggest size difference. Specifically, which predator hunts the largest prey relative to itself? I'm ...
Harthag's user avatar
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2 votes
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What is happening to this moth cocoon?

We 'adopt' a catepillar each year and this year I believe we have a Buff Ermine Moth. It seemed healthy and created a woven cocoon. It was at this point that I found out these moths overwinter. We put ...
Helena Johnson's user avatar
2 votes
2 answers
44 views

Prevention of disease spreading in animal kingdom

It's my first question on here, so I'm not sure If my question fits the theme. Please refer me to the appropriate one, If I have made a mistake. So a question that I wanted to ask has to do with ...
Đumić Branislav's user avatar
10 votes
1 answer
731 views

Fungivore that feeds specifically on spores

I'm wondering if anyone has knowledge of an organism that specifically feeds on the spores of fungi. When I attempt to research this the results are flooded with numerous examples of fungivores but I'...
Reese Lassman's user avatar
3 votes
1 answer
197 views

Largest crinoid species

On the wikipedia page of crinoids (sea lilies and feather stars), one can find the following statement in the paragraph "Morphology": [...] and fossil species are known with 20 m (66 ft) ...
G. Blaickner's user avatar
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What animal does this foot skeleton belong to?

I found an articulated foot skeleton. Sun bleached. What animal is this likely from?
Roxy's user avatar
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How to empirically differentiate social interaction from self-awareness in the mirror test?

When placed in front of a mirror, manta rays are more active (e.g. expose their ventral side to the mirror) and present more frequent and repetitive movements (e.g. furling and unfurling their ...
Sam's user avatar
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Phonotaxis and Preference

(Am I losing my mind?) I could have sworn there was solid research indicating that phonotaxis evidence for preferences (during ex situ experiments) was "held up" by en situ experiments...(by ...
Maddy M's user avatar
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What animal makes these sounds?

An animal near where I live in Austria is making these sounds. I'm thinking it is in distress, but I can't find it. Can anyone tell me what it is? It goes quiet when you get close, but responds ...
Double M's user avatar
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Can a crocodile crack open a turtle's shell?

To put the question more accurately I consider the Saltwater Crocodile, which has been measured to have a bite force of 16.4 kN and estimates of up to 34 kN in 6.7-meters long individuals. For turtles ...
Triceratops's user avatar
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7 votes
1 answer
807 views

Very small, light and dark "insects" - Italy - Infestation, healthy problems? - Insect identification [duplicate]

I'm currently in a town near Savona, on the coast in north-west Italy. We had a problem with pigeons, that create their nests in the space between the roof and the ceiling. Now, from the tube of the ...
M4rc0txt's user avatar
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68 views

What caused these shallow depressions in a European forest?

Recently, in an eastern European forest, I came across many depressions in the ground of a regular round shape, with a flat bottom and vertical walls. Many were filled with water. Some were obviously ...
Vladimir Orlov's user avatar
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0 answers
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Is it possible to identify a kind of scorpion based on a photo of its dried body

Somebody at my university have came back from a vacation trip and brought back a dried body of this small scorpion. Can you identify it for me? This is a very tiny (?) scorpion, if I may say so. I can'...
trejder's user avatar
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3 votes
1 answer
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Estimating the diameter of all earths biomass as a sphere

I am working on an educational resource about the relative scales of resources compared to the earth. Attached is an example of the earth compared to various elements contained within, as well as a ...
Robb Godshaw's user avatar
2 votes
4 answers
468 views

Where do the bones of dead animals go?

I've spent quite a bit of time in the wild, but I've seen little to no bones lying on the ground. Large bones such as skulls, spines, horns, hooves are not eaten by any other animals, and even ...
Vladimir Orlov's user avatar
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0 answers
21 views

Are there any Bilateria directly able to photosynthesise? If not, are such feasible/possible?

I'm trying to think of a type of animal, easily understood, that does not (and never has) existed, but that could feasibly exist. As most non-bilateral animals are complicated for a child, I was ...
Konchog's user avatar
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1 vote
0 answers
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What this shape name? (concave laterally and straight medially, cross section shape of crayfish rostrum)

What is a shape name for upper surface (colored black) of the cross-sectional shape in the attached image? It is a cross-section through a crayfish rostrum. It is horizontal and linear medially, but ...
crayman9's user avatar
3 votes
1 answer
797 views

Help identifying an insect

I live in Milan, Italy in the city center. I live in this house since 5 years and I keep finding the insect pictured below. I see it throughout the seasons (temperatures here range from -1°C to +35°C ...
user3161330's user avatar
29 votes
1 answer
4k views

I am trying to identify this bone I found on the beach at the Delaware Bay in Delaware. It is 2 1/2 inches wide and 1 1/2 tall

This bone was found at Big Stone beach on the Delaware bay, Delaware. It weighs only 19 grams
Robert Sperduto's user avatar
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0 answers
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Quantifying species detection probability using sign surveys as a function of distance in known occupied sites

I ran a pilot study to determine the probability of detecting a rare African small carnivore using scat (feces) detection dog surveys to assist with future population monitoring and occupancy surveys. ...
Michelle's user avatar
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0 answers
41 views

What is the Latin term for animals which dust bathe?

I have lost track of this term. I am sure that I encountered a Latin word (not a taxonomic word) which applies to all animals which dust bathe. I fact, I am not even sure how to describe a word like ...
Theo H's user avatar
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Is there an example in evolution where a huge jump in evolution happened due to a dramatic mutation?

Here is a chicken that due to a mutation got 4 legs: I wonder, are there examples, where such one-time dramatic mutational chages gave rise to a new species? Are there species that appeared not due ...
Anixx's user avatar
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Is there any research on whether a choanozoan might have invaded a similar enough holozoan to make the first metazoan?

My mind was piqued by the idea of endosymbiosis of a bacterium penetrating the cell of an archaean being a precursor to the advent of eukaryotes. And I thought that perhaps something analogous to this ...
blacktopshaman's user avatar
4 votes
1 answer
451 views

What kind of insect is this? It looks like a huge spider with one long antenna and six legs

It looks like a huge spider but with six legs and has one very long antenna. It also looks like it has claws. Please I would like to know what sort of insect it is. So I would know measures to take if ...
ALATIBA TEMIDAYO's user avatar
13 votes
1 answer
2k views

Have elephants (or any species other than humans) been known to cover their dead?

I was just reading this blog on HarperCollins website about 5 animals that grieve. Of elephants, the following claim is made: They bury their dead and pay tribute to the bodies and to the bones. [my ...
Curious Layman's user avatar
13 votes
1 answer
3k views

Identify blue/translucent jelly-like animal on beach

A few weeks back a beach in California had lots of this animal (if it is an animal?). Can anyone identify what it is? They had a distinct blue bottom and a see-through top.
JenserCube's user avatar
4 votes
1 answer
117 views

What species is this insect?

I would be grateful for help identifying the insect depicted in the attached picture. It was found inside a residential building (ground floor) at the periphery of Valladolid, a city in Yucatán, ...
Magma's user avatar
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2 votes
1 answer
267 views

How does sperm gets oxygen in the female reproductive tract?

At the time of insemination, sperm along with seminal plasma enters in female reproductive tract and the plasma contains fructose for providing the energy to sperm If the fructose follows just EMP ...
Mohit J's user avatar
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0 answers
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Do some animals have a notion of cooking? [duplicate]

Humans turned the concept of feeding themselves into a whole field in which they rearrange ingredients so as to obtain specific flavours and so on. It's more effort than just feeding ourselves. Do ...
xpsf's user avatar
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0 answers
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Is this a deathstalker

I want to know is this a death stalker ?
branded moeez's user avatar
2 votes
1 answer
1k views

Why do Bactrian camels have two humps and dromedaries one?

Why has the Bactrian camel evolved to have two humps instead of the one that the dromedary has? I searched on Google and I found nothing about it. All I found was that the that humps store fat, that ...
Marco Sulla's user avatar
0 votes
1 answer
135 views

Can citrate in semen be utilized as a source of energy by the sperm?

Prostatic secretions of semen include citrate as one of the component. The role of citrate in motility has been suggested by some researches. (Kavanagh JP. Isocitric and citric acid in human prostatic ...
Mohit J's user avatar
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15 votes
2 answers
5k views

Why do animals excrete excess nitrogen instead of recycling it?

I am aware of the different ways animals excrete excess nitrogen (mainly ammonium, urea, uric acid). My question is: why do we excrete excess nitrogen instead of recycling it? How can we explain that ...
tlorin's user avatar
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