Questions tagged [zoology]

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

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2answers
41 views

What is this animal looking like an Axolotl?

My friend caught a strange looking animal and he's saying it is an axolotl. I keep telling him it's almost impossible, since they are almost extinct in their natural environment and he caught it in St-...
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A fictional species relying on Mechanoreception to hunt prey? [closed]

I'm a writer currently developing a military sci-fi concept and could use help working through some theoretical creature designs. During early concepting, the actual specifics of the creature-threat ...
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What do oxpeckers eat from thick-skinned hippopotamuses and rhinoceroses?

Noted for their thick skin are both rhinoceroses (1.5 to 5 cm) and hippopotamuses (6 cm). They are further noted for their symbiotic relationship with bird called an oxpecker: Both the English and ...
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Identify an animal (Japan, urban area)

I met this animal yesterday while walking along a small river in Yokohama, Japan. It came out of the bushes some 5 meters away from me, but while I was launching the camera app on my smartphone, it ...
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Can it always be determined if an animal is a carnivore, omnivore, or herbivore by its teeth or are there exceptions?

Take the panda, for instance, it has canines but it's an herbivore. However, are there are other aspects of its teeth where one could still tell that it's an herbivore? Do the teeth always relay the ...
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Help me identify this animal from Bangladesh

I have come across this animal in a facebook group. After one group member identified it as Asian palm civet, I looked at some google images, I am not convinced. Judging from google images, this ...
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Do any non-human species have juveniles that cannot communicate with adults?

Human babies take 1+ years to begin learning how to speak (though sign language can be learned a bit earlier1). I know that cries, yells, and other non-linguistic sound are a simple form of ...
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What evolutionary advantages does a longer muzzle have against a shorter muzzle and vice versa

Basically I'm curious as to why when it comes to mammalian predators that some like say bears and canines tend to have longer muzzles than those like big cats. aside from their ancestors/evolutionary ...
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Eagles carrying off a goat to its nest: How heavy is the young goat? How strong is the eagle? Here is my guess:

I posted a related question, here, trying to identify the exact subspecies of animals. In the documentary El Hombre y la Tierra, a golden eagle carries off some sort of juvenile(?) goat. The Japanese ...
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Weak mouth-opening muscles

So I read that crocodiles have very powerful bites, but have much weaker muscles for opening the mouth. Is this unique to crocodiles or are there other animals like that?
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1answer
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A theory about the possible connection between protists and first animalia

I learnt that organisms within Kingdom Animalia can be either microanimals or (nonmicro)animals. a microanimal is any Kingdom Animalia organism that in general cannot be seen by a human eye without ...
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1answer
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What's the technical terminology for call-and-respond type behaviour?

The groups of some species such as water birds display a behavior that once out of line-of-sight a member will periodically initiate an interaction by make some type of sound, which will be followed ...
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2answers
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Lotka-Voltera predator prey model isocline?

In lotka voltera predator prey model, why do we get a straight isocline with variable prey/predator population for single value of corresponding predator/prey? I understand that we get the prey ...
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1answer
81 views

What pigment is responsible for the formation of blue skin color in some animals?

Not long ago I read about Vervet monkey. Here's picture: My question is what causes this blue coloration of the scrotum? I don't mean evolutionary need (e.g. attracting females), but what pigment or ...
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1answer
192 views

What specimen of caterpillar is this?

Early this morning, I found this beautiful caterpillar specimen crawling over a leaf: This specimen was found today morning (spring season) in Brazil at Porto Alegre City 30°01′59″S 51°13′48″W. With ...
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What is the current status of the taxon Crocodylus raninus?

What is the current status of the taxon Crocodylus raninus, the Borneo Crocodile? See Wikipedia Is it now a valid species, a subspecies of Crocodylus porosus (The Saltwater Crocodile) or merely a ...
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1answer
91 views

Helix aspersa or Cornu aspersum

The common garden snail was originally assigned as Helix aspersa and stayed that way for over 200 years. Recently, some biologists assigned it to the genus or subgenus Cornu renaming it to Cornu ...
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What are the most important structuring features of epipelagic habitats? How do these affect epipelagic zone animals?

The epipelagic zone is a featureless environment with no reference points. There's a lack of shelter from predators or substrate on which to rest. What other structuring features are there and how to ...
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27 views

What ant is this?

I'm really really confused about these ants. Basically they come to our home when grain is on floor or there is something sweet. The lenth is around 7 mm - 10 mm. May vary a bit. The front side is ...
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1answer
56 views

What is the effect of self envenomation on reptiles? [closed]

If a venomous lizard bites its own tongue will it die? I've searched the whole internet and I am unable to find a reliable answer on self envenomation.
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Calculate Q10 using the best line of fit

The question: The equation of the line of best fit is y = 3.5097x+16.529 I do not understand how to find the Q10 by solving the best line of fit. The observed data:
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1answer
62 views

Are there animal species where some females have greater amounts of male-associated qualities than average males?

In the human species, some women ( a meaningful, though not large percentage) are taller and stronger than the average man. Is a similar thing true in the animal kingdom? Are there some meaningful ...
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36 views

Which birds are capable of flying both forward and backwards?

Very random question - but it's often said that the hummingbird is the only bird that can fly backwards (for example, https://www.worldatlas.com/articles/which-is-the-only-bird-that-can-fly-backward....
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1answer
167 views

Which bird is this?

Found this today in my neighborhood, my mom says it's a baby vulture and she has seen many during her childhood (in 1970's) while she lived in a small town around 200kms away from our city. However I ...
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ANyone ever heard of a Cat Stacking small rocks?

Our 6th or 8th generation Savanah Cat has been taking the 1.5 - 2" out of our path and placing them in our yard in a small circle, atleast placed next to each other. We couldn't figure out how they ...
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1answer
61 views

What is this insect? (Location: Hong Kong; size: 8 mm long, 4 mm wide, 2 mm thick; color: black with some brown at center on the top)

What is this insect? (Location: Hong Kong; size: 8 mm long, 4 mm wide, 2 mm thick; color: black with some brown at center on the top) The insect in the picture was slightly damaged after an ...
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Predatory animal tracking methods

As far as I know, humans are the only animals that use visual references to track prey that is not immediately visible to them. Do any other animals do this? I'm not referring to stalking prey ...
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1answer
32 views

How do we know how long hermit crabs live in the wild?

This article states that hermit crabs in the wild are extremely difficult to track because they constantly change shells and even gender. Later in the article, they say that hermit crabs can live 4 ...
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1answer
36 views

Is there an adhesive that could used for larval fish?

I am currently working on an experimental design that requires a larval fish (~ 4mm long) to be affixed on a metal wire tip on its dorsal side. Now, I was thinking of a glue or adhesive to do the job, ...
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1answer
89 views

What is this hard shelled insect in my house?

I moved to a new city in west India last year and I've since, on several occasions, seen this insect on walls and it's usually climbing using its head. It has a greyish long shell and moves in a very ...
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23 views

is there any kind of paw/pads lines or paw muscle anatomy in animal hands?

just like in the title my question is, is there any kind of paw/pads lines or paw muscle anatomy in animal hands? or its pretty much random? example like mammary lines as bilateral structure that ...
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Characteristics of a giant squid’s skin

Is the skin of a giant squid/colossal squid similar to the common squid? Does it possess chromatophores to change color? Or did it lose that ability because of the depth at which it resides or due to ...
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How much does Scolopendra gigantea weigh?

For somewhat understandable reasons, most references I've found related to "size" of Scolopendra gigantea, and centipedes in general, seem to focus on length. There are numerous sites, blogs, etc., ...
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Can Chilopoda “vocalize” or produce sound for the express purpose of communication, as opposed to sound as a byproduct of other movements?

Is there any species of Chilopoda that can "vocalize" or or otherwise produce sound for the express purpose of communication, as opposed to sounds it might create as a byproduct of other movements ...
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24 views

Why can't geese regurgitate food?

I saw this harrowing video on how barnacle goslings have to jump off very high cliffs because the parent's can't feed them. The death rate seems high. Why did natural selection come to favor jumping ...
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38 views

Why do komodo dragons have covered teeth?

Apparently komodo dragons have a layer of gum over their teeth and often bleed from the mouths because of this layer being lacerated when they bite. Does this layer of gum serve any evolutionary ...
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1answer
75 views

Can someone explain this phenomena?

So many parakeets sitting on a tree with no leaves ?
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1answer
27 views

Which fishes produce alarm signals to warn other group members about in coming predators

Atlantic Goliath Groupers are fishes which produce unique low frequency sounds to mate and when approached by predatory fish . The sounds produced when approached by a predator (or even a scuba diver) ...
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1answer
51 views

How can cats' claw grow sharper without replacing the claw?

I cut my cat's claws once a month. The claws always have pointed and sharp tip even though I had cut them last month. I assumed cats cannot change the shape of the claw by growing new keratin at the ...
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1answer
60 views

Identify this insect (looks like part of a tree)?

I found this insect and thought it was part of a tree at first, then it moved and so I knew it was an insect. I've never seen it before though so I am posting here hoping someone knows what it is. ...
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What are the chemical constituents of Spongilla fluviatilis

It's is fresh water sponge of Phyllum porifera, class- demospongiae, order -spongillida, family- spongillidae, genus- ephydatia.It's zoological name is Spongilla fluviatilis, it's synonym is ...
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Are these termites

Found a large number of these trapped between my window and the window frame. Are they termites? Location: Eastern Massachusetts, USA
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Where can I find extensive information on animal blood types and transfusions?

I'm interested in doing research on different animal blood types, including blood transfusion across different species. What are some resources you could recommend for me?
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1answer
56 views

What is a false crocodile?

On the wikipedia page about crocodiles crocodiles are called true crocodiles. Does this mean there are (or where) false crocodiles as well? Crocodiles (subfamily Crocodylinae) or true crocodiles ...
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1answer
224 views

Snake with strange head

This snake was killed in graveyard Peshawar (Pakistan). I just wonder what is this? Is it a snake? Baby crying sounds were reportedly heard from graveyard in Peshawar after months of search the sounds ...
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0answers
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Recognise this thing found in beach?

Kindly help me identify this thing found in beach Chennai, India . Size would be just 1.5 cm in diameter..across maximum size. It's shelled and has something inside it. It make a small noise when it ...
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What type of guppy is this?

This is a guppy I recently bought from a local pet shop. They don't exactly know which type of guppy it is. I hope to get info about it's type.
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Can anyone please identify this?

We saw this leech like worm in Kerala, India. Can anyone identify it for us? I saw it today, 10th September. It's about 6 to 7 centimeters long. It was very still, didn't move while we went close and ...
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Can a certain snake kill human by 'drinking' his breaths? [closed]

In Rajasthan in India, locals know a snake called peevna in the local language. Many of my relatives live there in villages in open deserts. They see many kinds of snakes every day. The word peevna ...
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Cormorant vs eel possible feeding?

I recently saw a cormorant at our local park. It dove pretty quickly, soon after it came up struggling with a large green eel. The thick 2' eel seemed quite determined to escape by thrashing and even ...