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The biological study of animals.

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Larve attacking frog ? Guide about this

Below picture taken in western forest of India where larvae attacked on frong neck how it will effect on future
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16 views

Can you tell me the ID of this bird

Picture taken on September 2018 by me in India
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21 views

Please give information about this sun bird

Please tell me name of this sunbird picture taken by me in 2016 in India
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15 views

What kind of sieve does one use to extract meiofauna?

Suppose I have a core of sediment, and I want to extract the meiofauna from it, in order to study these organisms. According to the sources I could find, this involves using a very fine (e.g. 45 μm) ...
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12 views

American Red Squirrel (Tamiasciurus hudsonicus) physical dimensions?

I am trying to determine the physical dimensions of the American Red Squirrel so that I can construct a graphic representation for a project I'm working on. Mainly, I lack standing height and width ...
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18 views

Efficacy of sonic kangaroo deterrents

Bender (2003) tested the efficacy of sonic kangaroo deterrents. Their device is static (and apparently ineffective). Has there been any rigorous testing of the whistle-like 'kangaroo deterrent' ...
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1answer
49 views

Why do crocodiles have a high concentration of lactic acid in their blood?

Crocodilians have high concentration of lactic acid in their blood. This is the cause that prevents them from prolonged intense activity, since prolonged intense activity causes the muscles to secrete ...
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0answers
28 views

Which extant species has the largest horns?

Among the bovids (cattle, antelope and all member of the Bovidae family): which species has the largest and longest horns? Please answer when including and excluding domesticated livestock and cattle. ...
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2answers
125 views

Among primates, is it true that homosexual behavior is extremely unnatural and uncommon?

I was recently reading a book published by some anonymous biologist known as Lynn Saxon, in which she appears to want to refute Christopher Ryan's thesis in Sex at Dawn that prior to the invent of ...
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19 views

What kind of horn is this?

We found this horn and know nothing about its origins. It seems super short! Maybe we are mistaken in thinking it is a horn at all...
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20 views

Is there mismatch in injures or death numbers for carnivores that hunt during day time and night time?

Is there significant mismatch in injures or death numbers for hunters (when hunter was killed or injured by its prey), between day time and night time hunts (carnivores that hunt during the day time ...
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1answer
57 views

Why are the hormones dopamine, adrenaline, noradrenaline and serotonin so ubiquitous across the animal kingdom?

As far as I know there is no reason for the makeup of a given hormone to be universal as it merely serves as a carrier from one part of the brain to another. So why are the above hormones seen across ...
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35 views

Is it more risky for lions to hunt during the night?

Lions as I understand are very versatile hunters. Using many different hunting strategies to increase their success rate including hunting during the night. Do they risk more during night hunts (...
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0answers
37 views

Is there a limit on how big a free living unicellular mono-nuclear organism can be?

When I looked for the largest protozoan I've found the name Syringammina fragilissima. According to wikipedia " .. Syringammina fragilissima, is among the largest known coenocytes, reaching up to 20 ...
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0answers
32 views

What is this white bird called?

White bird that looks like a pigeon or a dove. Does anyone know what it’s called?
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0answers
175 views

Insect identification - Is this a baby cockroach?

This bug was found in a kitchen in Augusta, Georgia. I've seen it three times in two days (and some more in the past). Two nights ago, It was on my arm. Last night, I saw one on the kitchen floor and ...
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1answer
39 views

What are the classical adaptations of amphibians? [closed]

My question is about amphibians in humid or underwater environments. What biological adaptations can found in them, further what purposes do they serve?
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1answer
34 views

Why do frogs and toads only appear when it is dark outside?

I noticed outdoors how frogs and toads only appear when it is dark or cloudy. Such as only after it rains or during night time. Why is this?
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1answer
30 views

Why swordfish aren't put in the same family as Marlins?

Why Swordfish (Xiphias gladius), which are very similar to Marlins, do not belong to the same family as Marlin - Istiophoridae? Both has long bill or a sword in the upper jaw, both has (at least in ...
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0answers
17 views

How did craniates evolve?

Looking at most chordate phylogenetic trees, it seems that we usually have something like this: ...
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1answer
73 views

Identify this excreta!

A picture is worth a thousand words! It's about 1.3cm (1/2") long. We rented a basement and I found this on a machine that was moved in a bit earlier. I would like to know if there are any mice, ...
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1answer
73 views

If wolves (or foxes) are fitter than rabbits, why rabbits have not become extinct? [duplicate]

I do not pretend to "demolish" the Darwinian theory of biological evolution and the "survival of the fittest", that's far from my intention. I have this doubt because of the fact that humanity, as ...
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1answer
53 views

What benefits do sloths and manatees gain from algae growth on their fur/skin?

Slow moving sloths and manatees have green algae growing on their fur/skin. Are there any other animals that have algae growth on them, and does the algae benefit the fitness of these animals? ...
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38 views

Can anyone identify this insect, is it a tree bug species

This insect was found in Pune, India near a Bauhinia variegata (orchid tree). I think it's a bug. What species is it?
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24 views

Butterfly/Moth identification: Puppa is half green, half brown, and 1,5cm long, found in Upper Austria

Question: What butterfly is going to evolve out of the puppa illustrated in the attached picture? Characteristics: Puppa is half green, half brown, and 1,5cm long Further details: I don't know if ...
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37 views

what's the species identification of that camponotus queen

City: Antalya, Turkey Date: July 27 night Specific location: I found it in the middle of the city
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0answers
29 views

Why is Engraulis encrasicolus(boqueron) conservated in fresh water?

I've been visiting fishmarkets for a while and ive percieved that fishmarketers usually conservate Engraulis encrasicolus (boqueron, anchova, etc) in fresh water with ice. They say that it is because ...
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0answers
79 views

Is this a bed bug nymph?

hello , I want to know if this is a bed bug nymph or it's just an another insect? I got an issue with bed bugs few days ago in a hotel during a travel to Prague. Once home (in Germany), I washed all ...
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0answers
24 views

Can someone identify this Lepidoptera larva?

That's from Brazilian Amazon, more specifically a small mountain (300 m high) called "Morro dos Seis Lagos" (six lakes hill), at São Gabriel da Cachoeira municipality, Amazonas state, located at 0.283 ...
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1answer
29 views

Is it possible to guide animals to a new breeding ground?

(This is a question for a book I'm working on.) One of the threats to some animal species is the disappearance of breeding grounds (because of the spreading human population, or for example because ...
3
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1answer
81 views

Do cows chew in a preferential chirality?

One of the enduring myths in molecular physics, when talking about chirality as pertains the existence of enantiomers and the differences between them, is that the way cows chew is also chiral, i.e. ...
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1answer
35 views

Factors That Would Promote Eusocial Development In Mammals?

What would cause mammals to evolve to be more eusocial, like the naked mole rat did? What advantages does eusociality give in such scenarios?
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1answer
33 views

Is this a soldier beetle? Bug identification

I'm curious to find out what kind of bug this is. Reverse Google image search suggested a type of soldier beetle, but I am not convinced. The photo is taken in summer, in England Thanks!
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1answer
27 views

Some facts about the chameleophant please [closed]

Can you give me some facts (where it lives, their size etc.) about the chameleophant? Can't find it on google...
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1answer
22 views

Does the repellence of an insecticide affect its efficacy (measured in insect mortality)?

I am currently working on assessing the efficacy of a suspected insecticide on a particular species of insect. I happen to be looking into any repellence caused by the substance. I test for both ...
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1answer
30 views

replenishment of wild salmon [closed]

I understand fish from salmon farms are inferior, so I am wondering if it would be better to 'seed' the original waterways with wild caught roe/milt? I am sure it is complicated, but so is salmon ...
3
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1answer
72 views

Are all mammals capable of sneezing?

I only know dogs and humans sneeze... so do other mammals sneeze as well? Is it possibly an evolutionarily-determined immunological trigger?
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3answers
87 views

What did the evolution of multicellular animals look like?

What did the evolution of multicellular animals look like? Aspects of this question include: (1) Are there any living organisms that might be helpful in visualizing "transitional forms" between ...
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1answer
29 views

Addax in the Land of Israel

The Addax (Addax nasomaculatus) is critically endangered species of a desert anetelope with impressive long horns. Today there are small populations in the Sahara desert and the Arabian desert (Saudi ...
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0answers
27 views

Identifying a spider very similar to a brown recluse

I took this pic tonight when I saw what I thought to be a Loxosceles reclusa or brown recluse. But when I looked closer, the typical pattern on the back of its cephalothorax seems to be upside down! I ...
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1answer
35 views

Would butterflies prefer drinking blood over nectar?

Knowing that butterflies will drink carrion blood and nectar, I wonder if they would prefer one over the other? The blood has more nutrients like iron and copper that the nectar would not have. Or do ...
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2answers
101 views

What animal does this skull belong to?

This skull was found in Greece, about 40 years ago, possibly in the island of Euboea (there is uncertainty about the area it was found). The length from nose to the end of horns is 67 cm. The skull's ...
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0answers
23 views

What's the name for this kind of pointy/raised texture in animals?

I was in a store and I saw a jackfruit, seen here https://livenaturallymagazine.com/all-about-jackfruit/ with this sort of...scaly yet round and also pointy texture. Then, I could have sworn I saw ...
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0answers
19 views

Do birds have quadriceps and thighs fused into their hips?

I'm looking at 3D modeling a large bird like an emu or ostrich, but I don't know how the muscles surrounding the femur connect to the hips/back. It seems weird that the entire thigh and quadriceps ...
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1answer
505 views

Are there any animals that maintain white fur year round?

Besides examples of rare albino animals, it seems animals only have white fur during the winter. Additionally, and not coincidentally, the examples I've found live in the northern latitudes with ...
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0answers
49 views

Reference for the bite force for Nile Crocodile

The (maximal) bite force of the Nile Crocodile (Crocodylus niloticus) is estimated around 22,000 Newton (refer to YouTube interview with Ofer Kobi, a crocodile conservation ranger and croc farm owner, ...
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1answer
27 views

Square-cubed law and health

Does the square-cubed law lead to possible health detriments for taller people? I'm not sure what the optimum height is for humans (e.g. due to their cross-sectional bone density constraints), but ...
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2answers
49 views

How to learn and memorize animals classification to get an intuition about them?

I would like to have a good intuition on how close is what animal to which one and how large each group is by number of species and population. I was wondering if there is a good website with good ...
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0answers
31 views

What is this frog I found

What type of frog or toad is this? I found him in my backyard in southern Alabama and he is clearly very small. I’m not sure what species it is, it’s mostly brown but has small spots on the top of his ...
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0answers
28 views

why hens determine the sex of the chick?

So, I have an exercise where I have to correct the second part of the sentence. It goes like this: In hens, the sex of the chicken is determined by hen, because the hen is the heterogametic ...