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 ...
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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 ...
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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 ...
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1 answer
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What exactly happens to animals that fail mating rituals?

Quite a few animals (usually males) participate in various mating rituals to showcase their fertility as mates. While presumably, the successful ones get a chance to mate with females, it occurred to ...
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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 ...
5 votes
2 answers
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Why do orcas eat only the tongue of whales, liver of sharks, etc.?

I noticed that although killer whales are clearly the top predator living in the present oceans, some of them appear to be very picky with their meals. After spending hours hunting down a whale, ...
7 votes
2 answers
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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 ...
3 votes
1 answer
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Unidentified Spider

Apologies for the rubbish quality of the image, but I found this spider while in the shower. I’m not exactly sure what species it is and wonder if someone can help me out. I live in southeast ...
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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.
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1 answer
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Is this an asian hornet

My mother found a hornet at home (in northern France) that is probably building a nest. Is that an asian hornet? If yes, how can I exterminate them?
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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 ...
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2 answers
911 views

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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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
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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 ...
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Hippos in infrared

Watching Netflix's "Night on Earth", I discovered that Hippos, or at least some Hippos, have quite a weird appearance in infrared. They seem to be covered by IR bright spots all over their body, ...
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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 ...
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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 ...
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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 ...
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1 answer
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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 "...
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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 ‘...
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1 answer
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Want to know about a creature which bite me

I am Sachin from MP India. Few minutes back I have gotten bite by a creature. What is its name? Is it harmful if I got bitten by it? Feeling little pain there.
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3 answers
782 views

Can elephants really paint?

I saw this youtube video of an elephant painting. (https://www.youtube.com/watch?v=foahTqz7On4&t=301s) There are others as well. It looks completely real. However, like other people in the ...
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1 answer
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Is this arthropod non-intrusive and recommended to be left alive?

I am in Portugal (Lisbon) at the moment, and when leaving my room late at night (12 pm ~ 04 am) I usually face about 4 of these arthropods in the corridors: (For reference, the "line" in the image is ...
5 votes
1 answer
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Caterpillar(?) in Leaf Cocoon identification - Missouri

A small chunk of leaves fell off of a potted tomato plant. We noticed our cats taking an interest in it once it started moving. Then a little caterpillar poked its head out. What kind of bug is this ...
3 votes
1 answer
302 views

Species identification. Is this a leech?

The pictured creature, shown at the bottom of a glass, was attached to a friend’s child after he was swimming in the Ottawa River today. It stretches out to roughly an inch in length but in this “...
1 vote
1 answer
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What kind of animals are these little creatures?

I have 3 tanks. 1 with my fishes and 2 other are technical. The smallest one is 0.5l and I'm using it as trash bin where I put dead plants and algae from main aquarium and it has sand from the see at ...
1 vote
2 answers
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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
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1 answer
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Hammerhead worm

Which Bipalium is this worm? It has no tripe. Nor head collar. It is dark brown as can be seen in the image. This worm is right now in Mauritius. Please help me recognise this Hammerhead worm. Thanks
5 votes
2 answers
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Species identification - what kind of worm is this?

I am finding these worms in my bathroom since summer arrived. I have been finding these on floor, walls and damp towel I left hung overnight in bathroom couple of times. When these worms are squished, ...
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2 answers
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Why is blood pressure higher the more distal an artery is?

Why is blood pressure generally higher in more distal arteries?
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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, ...
5 votes
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Identify this bone found on beach

Does anyone have an idea what this bone is? It was found on the beach in the Outer Banks, North Carolina, USA.
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I found this tiny transparent creature in my aquarium - what is it?

Please help me identify this 1-2 mm nearly transparent animal which I found in my salt water aquarium.
37 votes
3 answers
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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 ...
11 votes
2 answers
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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-...
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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 ...
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 ...
8 votes
2 answers
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Insect with long neck—what is it?

I found this insect in Fish Haven, Idaho (right next to Bear Lake) in June and think it’s absolutely fascinating: If you can’t tell from the picture, it’s a few centimeters in length—very thin with a ...
2 votes
2 answers
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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 ...
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'...
3 votes
1 answer
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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) ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
7 votes
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Bug Identification: Tiny Bugs

I have seen these on my hands recently and I am wondering what they are. Urban Setting. South Central Pennsylvania.
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1 answer
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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 ...
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 ...
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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 ...

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