Questions tagged [zoology]

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

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Can anyone identify this bug? Found in Toronto inside condo 4th floor

I am hoping someone can identify this bug. I live in Toronto, Canada. I’ve found two of them inside my condo recently and I would like to know if they might be a problem.
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Did I identify the heart of the pig correctly? [closed]

Just to double check, is the thing I boxed in with violet the heart of the pig in this picture? Picture taken from here
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1answer
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What is this bone from?

This object showed up on my fire escape in New York city. It appears to be some kind of bone. It's a bit smaller than an adult human hand. What animal is it from?
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What is the average density of mucosal gel in the mammalian stomach?

What is the average density of mucosal gel in the mammalian stomach (for example, humans, pigs and rats)? Units of measurement: grams per cubic centimeter or milligrams per cubic centimeter. Search ...
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1answer
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Do wolves mate with siblings?

I have just watched a "documentary" on a female wolf raising her cubs in the Alps. I found various aspects of the programme less than convincing, but one in particular puzzled me. The alpha ...
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1answer
105 views

What is this large, lively barnacle?

Yesterday I found this creature in a rocky cove in central California, around mid tide (+ 3 feet). It's about 3-4 inches long. At first I thought it was dead, but it closed its mouth when I removed ...
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Do cougars make any calls when attacking prey?

I've read that Cougars make a noise like a woman screaming during mating. I could not find any information about whether they make any sounds when attacking prey. I read they are ambush attackers, so ...
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1answer
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Owl identification. Winter in Haliburton, Ontario, Canada

Is this owl a 'Great Grey Owl' or 'Barred Owl'? I'm thinking a Great Grey because it was quite huge - about 1.5 to 2 feet tall.
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1answer
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Bug Identification: Black Insect with Red/Orange dot on back

I lifted the cover off my push bike today and discovered 15-20 of these insects all along one of my brake cables. A few were tending to "egg" like structures that were stuck to the cable and ...
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What kind of spider is this from New Zealand?

This is biggest one I have caught so far: They would occasionally walk into my house and wait for the night to go out and about.
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2answers
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What is this spider with blue striped head?

I found this spider on the balcony of a Brisbane, Australia quarantine hotel. About 1.5cm. Anyone know what it is?
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1answer
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There are some species that grow throughout their lives -- is there evidence that even in adulthood their brains increase in size?

One species I have read about is carp whose growth is limited only by food supply and space. One can actually, because their skin is almost transparent, see their brains and it sure does look like ...
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1answer
128 views

What are these bugs eating my lumber?

Duplicate of this question. I found bugs in wood that I've had air drying for the last few years. What are they? I had a tree cut down a few years ago and some of the wood milled in to slabs. However, ...
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275 views

What animal has the strongest immune system?

I'm wondering what animal has the strongest immune system. It can be defined as the most evolved immune system or the immune system that can eliminate or tolerate most number of (different) viruses/...
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1answer
101 views

Are snake capable of love? (social bond in a male/female couple)

I'm wondering whether it has been noticed that some species of snake form male/female couples for life (or at least multiple reproduction cycles) like other types of animals do (penguins come to mind)....
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36 views

Best way to estimate wolf density through camera traps

I would like to know the most suitable sampling strategies and analytical methods (possibly, with relative bibliographical references) to estimate the populational density of wolves through camera ...
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Does a brown Pieris brassicae chrysalis indicate it is dead?

I have been breeding Pieris brassicae larvae in a glass tank indoors for my own personal observation. One of them, after the fifth instar, has moulted into a chrysalis. After 5 days of development in ...
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Are there taxonomic keys for members of the family poeciliidae in America?

I wish to know what are the taxonomic aspects necessary for the identification of certain species of poecilids, specifically what is the role in the counting of rays and spines and also the ...
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Please, help identify this sea worm

It was found in Malta, in a puddle by the sea. It left a lot of tiny hair on the shoes (which we removed thoroughly without touching them). I didn’t have any coins with me so I put keys for scale.
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1answer
55 views

For animals with separate hermaphrodite and non-hermaphrodite populations which is more common, female + herm or male + herm?

I think the question already says it all. I know there exist animals that have both herm and female populations and other's with herm and male populations, I'm not personally aware of any animal that ...
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1answer
77 views

Kansas Spider Identification, found in Pasta Package

I live in Kansas. I found a spider inside my macaroni pasta package after dinner (6pm), and I really want to figure out its species. Since I have consumed food from that package, I'm especially ...
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Species Identification: Worms in the toilet, Central Switzerland [duplicate]

I wasn't in my flat for about 2 weeks. When I came back I found some worms in the toilet. What species is that? I also recorded a short video of it here.
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1answer
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Are 99% of animals bilaterally symmetric?

The Wikipedia article for "Symmetry in Biology" claims: "Animals with bilateral symmetry are classified into a large group called the Bilateria which contains 99% of all animals (...
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Vertebrae looking bone found on beach in New Zealand

I found this bone on a beach in New Zealand. Does anybody have any idea which part of the body or which animal it’s from? (click to enlarge)
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What species is this fly? Look like mosquito with unusually long legs

I found this in Bangalore, India. It looks exactly like a mosquito but with extremely long legs, first I confused it with long legged spider (which are common here) but it's not, Can someone tell me ...
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2answers
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What bug has similar legs to a prawn?

This is a bug that I observe in Melbourne. This bug is living in wet places and jumping a few centimeters while its length is 8.5mm. It does not have insect legs. It's legs are more similar to prawn. ...
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2answers
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What terrestrial trait makes cetaceans so successful in an aquatic lifestyle?

Intuitively, I would expect that an organism that has lived in the ocean for millions of years and can breathe underwater should outcompete any newcomer that is not fully adapted for oceanic life. It ...
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For which wing characteristic are Plecoptera (stoneflies) named for?

I'm coming across variable etymological meanings for the order Plecoptera (stoneflies). Some sources indicate the meaning is "wicker/braided-winged", while others suggest "folded/...
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What species of snake is this? It was sighted in NE New Mexico, Union County

The snake in this photograph was found injured/dead in Clayton, Union, New Mexico (USA) on 10/06/2021. I want to know if it is a juvenile bullsnake or a Chihuahuan Night Snake...or something ...
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Deflated bag-like species on beach: Identification

I encountered this on a beach in Chandipur, along the Bay of Bengal in India. Quite a few of them were scattered in different locations. Identification of this controversial object is appreciated.
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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.
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Evolutionary advantage of the nutrient played by the chicken [duplicate]

What is the evolutionary advantage of the chicken throwing out so much nutrient ovulating all the time? Is there a clear advantage to this? Chickens ovulate all the time for the same reason human ...
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1answer
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Do the activity patterns of an owl species determine their eye colour?

Recently I've been thinking about the colour of owl eyes, and trying to figure out if there is a pattern anywhere between species. I have read for example, that yellow-eyes implies they are day time ...
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What are the current theories on how baleen whales make whale song?

Wikipedia does not provide many details1 on how baleen whales produce 'whale song', saying it's still a mystery. The linked Gizmodo article provides these paragraphs: Humpback whales, for example, do ...
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1answer
515 views

What is this water animal in my swimming pool?

I have had a swimming pool (which is salt) for few months. 2 weeks ago I saw this: I made a quick gif of a video: Today, I found 4 more of this animal: All of them that are living I found in the ...
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1answer
86 views

Do you know what kind of bug this is?

I have tried to find a similar picture online, but can’t seem to find any. Does anyone know what kind of bug this is? It has been on a penstemon plant for about 3 days. I am located just outside of ...
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1answer
126 views

What animal is this? Caution, GRAPHIC!

One of my friends stumbled upon this half part of an animal. It seems lizard-like...I don't think I've ever seen a lizard that large, though. We live in Greece. Can you figure it out? Close-up and a ...
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1answer
58 views

What insect is featured in this picture?

At the end of the summer, we've been finding these insects in our apartment complex in Baltimore, MD. What are they and do they bite? The length is about the size of a US nickel (We've had mysterious ...
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1answer
65 views

Why are humans rarely preyed on?

I did a bit of research and noted that some animals such as alligators can indeed digest humans. However, in a lot of cases, they actively avoid humans (bears, alligators, boas). Intellectually, yes ...
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1answer
80 views

What type of animal is this? [duplicate]

There was a leaking fire hydrant across a sidewalk. On the other side was a lake. The fire hydrant water was streaming across the sidewalk. I saw it swimming in the sidewalk away from the side of the ...
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1answer
72 views

Is this a nymph of a Zelus renardii or Zelus luridus?

My mom found this insect on one of her plants, and she would like to know what it is and whether it is dangerous or harmful. I've done some research and I think it is a nymph of a Zelus renardii, but ...
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Better understanding the life cycle of lasioderma serricorne (cigarette beetle, cigar beetle, tobacco beetle, drugstore beetle)

Lasioderma serricorne, commonly known as the cigarette beetle, cigar beetle, tobacco beetle, or drugstore beetle: Live 2–4 weeks. The female beetle lays as many as 100 eggs loosely on the substrate ...
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1answer
46 views

Bug identification

Germany, cca 0.6mm, dead Bug, i haven't see before
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1answer
107 views

Is this a bed bug? Looks like a skeleton

Is this a bed bug? Germany, the size of specimen is 0.6 mm.
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1answer
120 views

What animal is this track from?

Last week I noticed this odd track made of "squiggly triangle footprints" on the outside surface of a dirty skylight in my home in the northern Netherlands, and I found it odd that I can't ...
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2answers
102 views

Identification of a spider — South India

I found this spider jumping around in my garden , to describe it is blue and black . I noticed that it has strong front legs and a pointed posterior , it has blue designs on a black body . I live in ...
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1answer
63 views

How old is the Pogona genus?

What it says on the title, how old is the genus Pogona, which includes all bearded dragons? I tried looking online, and all I got was the useless answer of “bearded dragons are descended from their ...
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1answer
106 views

Can anyone identify this fish?

I saw it in the sea very close to the beach in front of Starfish Hotel in St Lucia. It had some spines along its back and it seemingly had fins on each side that split open into 4. It used its front ...
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2answers
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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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