Questions tagged [zoology]

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

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1 answer
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Has anyone seen/read interspecies competition that is different at spatial scale for the same group of animals?

I work at a highly fragmented wildlife sanctuary in North Borneo, Malaysia. We have 8 species of hornbills here and from our observation they've grown to be less territorial in terms of where they ...
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0 votes
1 answer
44 views

What types of sounds do sperm whales produce?

Sperm whales produce echolocation clicks, what are the other types of clicks and other sounds they can produce?
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1 vote
0 answers
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What is the name/type/species of this insect?

Facts: Found in a bathtub in western Washington (state) (the pacific northwest). 3/16-1/4" long, 1/8-3/16 thick. Gray colored. No elongated noise but two antennas. No pets in home, older 1969 ...
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7 votes
1 answer
50 views

Animal specific names with non-alphabetic characters

I'm part of a research team that investigates and documents native bee species, and we identified one of our Andrena specimens as A. w-scripta. With over ten years of experience in insect and ray-...
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5 votes
1 answer
44 views

Why is the sex ratio of male and female cats close to 50/50 (with males actually being more prevalent)?

According to this study from 1970, cats are about 50% male and 50% female. Furthermore, there appear to be about 100 male pedigree cats born for every 92 female cats. I couldn't find any info about ...
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3 votes
1 answer
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A level 2022 Biology percentage increase question

In January 2022 WBI12/01 they asked: 9c. In 1963, there were only three males and 12 females of C. hoodensis left in the wild. These 15 tortoises were used in a breeding programme. ii.The wild ...
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4 votes
1 answer
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Is there a published calibration between footprint measurements to body length in moose?

I am in the early stages of designing a study involving a moose (Alces alces) population. An often-true heuristic is that body parts of an animal monotonically increases in size. There likely exist ...
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8 votes
0 answers
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Why the "trailing" woodpecker sound?

I recently (March 26th, 2022) recorded a woodpecker in the woods around Habo Ljunga, Lomma, Skåne, Sweden and that gave me an idea. While cutting the audio, I noticed that the woodpecker's sound seems ...
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11 votes
1 answer
521 views

How could microplastics accumulate in the bodies of marine mammals?

I have read several literature reviews and studies on the effects of microplastic particles on fish and invertebrates (one example includes the review by Franzellitti et al. (2019)) and there are ...
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-1 votes
0 answers
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What fundamental aspects of the shape of a leg make it optimal for long jumps?

Lots of animals jump, from frogs to kangaroos. But, of the animals that seem to rely so much on jumping, what fundamental properties of the shapes of their legs are optimal for jumping? Anything about ...
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2 votes
1 answer
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Photo attached of flies ‘injecting’ into spider egg sacs. Why? What’s going on here?

Brisbane, Australia. While no image is available, direct observations were made of flies doing something to the egg sac.
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1 vote
1 answer
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How can this coral survive with little sunlight?

Forgive me if this question is off topic, but I’ve seen similar questions so I think it should be on topic. I’m at the beach currently, and I was looking in tide pools for interesting things. I found ...
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0 answers
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Do all vertebrates have a hypothalamus?

Since mammals and birds are warm-blooded animals, it's got me thinking whether our less-evolved vertebrate pals (reptiles in particular) have a sort of mechanism, alike to our hypothalami, that is ...
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3 votes
2 answers
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What is the phenomenon when animals mimic other animals in order to survive?

The caterpillar Hemeroplanes triptolemus adopts the appearance of a snake when it detects danger. What is this phenomenon called in which animals mimic other animals in order to survive? Is it ...
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3 votes
1 answer
56 views

What's the definition of 'natural prey' and 'natural predator'?

I am sure we all see both of these phrases used commonly, but is there a reason as to why the terms 'natural predator' and 'natural prey' are used as opposed to just 'predator' and 'prey'? Below are ...
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2 votes
1 answer
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What insect in shell is this?

Location: INDIA(Tropical Monsoon) I found an insect (approx 7mm) (marked with red in image) in my bedroom hanging from the roof. It can spin some kind of thread, since it was hanging at the first ...
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5 votes
1 answer
96 views

Which animal has the smallest percentage of their body mass made up of water?

It's a "well known" and interesting "fact" that the human body is made up of "mostly water". With percentages from 65% to 90% often being repeated as if they were exact ...
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1 vote
0 answers
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Which varieties of Aurelia aurita do not have a polyp phase?

According to this "In some Aurelia aurita, the polyp stage does not exist.", but they don't cite anything. Is there a resource detailing life cycles of various jellyfish or do I have to find ...
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2 votes
0 answers
66 views

Does anybody know what sort of fossil this could be?

enter image description here Found in rural North Dakota. Small rock with black circular indentations.
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0 votes
1 answer
92 views

What is the modern experiment in which a frog was heated at the slowest rate?

I did a bit of research on the boiling frog phenomenon. It turned out that: In the 19th century, there have been done three experiments in which a frog in water was heated very slowly. It didn't jump ...
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2 votes
0 answers
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What is the thickness of the mucous, submucosal, muscular and serous membranes of the stomach wall of a piglet aged 60-75 days? (Large White pig)

There is publicly available data on the thickness of the layers of the stomach wall of piglets aged no more than 20 days. But at an early age, the thickness of the layers of the stomach wall increases ...
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0 answers
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Movement of Common Jelly Fish

Among the different types of movements in the bodies of various organisms, the movement exhibited by jelly fishes are very unique and peculiar in some ways. I can't understand how to classify the type ...
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4 votes
0 answers
147 views

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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0 votes
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What's the best way to find a Tardigrade

So I have a school science project on the best sample to look under a microscope, so I want to bring in a Tardigrade. It's winter here in Ohio, although Tardigrades are freeze tolerant I don't think ...
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-2 votes
1 answer
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Why porifera is classified to have an incomplete digestive system although it has no organs?

Why are we using the term "incomplete" for digestive system only? We could have also said that for circulatory system that it is either incomplete or present as a simple system. What I mean ...
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8 votes
1 answer
2k views

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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4 votes
2 answers
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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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5 votes
2 answers
133 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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14 votes
1 answer
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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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4 votes
1 answer
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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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3 votes
1 answer
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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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10 votes
1 answer
217 views

What do cats see when they look at 2D, still images?

My cat doesn't like other cats. She doesn't really like anyone that isn't part of our family. So when she sees other cats she will aggressively try and chase them out of her area. She will also do the ...
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27 votes
2 answers
3k views

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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1 vote
1 answer
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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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2 votes
1 answer
141 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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4 votes
1 answer
1k 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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3 votes
1 answer
115 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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4 votes
2 answers
124 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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2 votes
0 answers
28 views

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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2 votes
0 answers
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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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4 votes
1 answer
96 views

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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1 vote
1 answer
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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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3 votes
1 answer
86 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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3 votes
0 answers
53 views

What species of insect is this, spotted south-east of Berlin? Habitat: forest near lake shore, Size: body 40mm, w/o antennas and ovipositor

This insect has been spotted south-east of Berlin (2021-10-31).
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0 votes
0 answers
41 views

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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4 votes
1 answer
122 views

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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0 votes
0 answers
83 views

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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1 vote
0 answers
37 views

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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2 votes
2 answers
70 views

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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2 votes
2 answers
87 views

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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