Questions tagged [ornithology]

Questions relating to the study of birds.

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-1
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1answer
37 views

How do birds eliminate oxygen free radicals [closed]

Birds breathe in a lot. Do they produce a lot more of oxygen free radicals than mammals? And how do they cope with oxydative stress? Thanks!
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2answers
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What species of duck is this?

What species of duck is this? See below photo. Head colour is green like a mallard, but that's pretty much the only similarity. Spotted in Leicestershire, UK.
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2answers
1k views

What is this bird of prey with white belly?

This bird was around the house in northern Switzerland (alt: ~700 m) on January 17th 2016, and I am just wondering what kind of species it is. The legs are yellow and the under (I do not have picture ...
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0answers
45 views

Feather Identification

From which bird or birds come these feathers?
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1answer
44 views

Do airsacs contract and expand when birds breathe? [closed]

Something I was wondering. When birds breathe, do their airsacs contract and expand like the lungs do? Also, if they do, do they contract and expand as much as the lungs do? Thanks so much!
0
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1answer
20 views

Which Hawaii bird makes this call at night?

I'm on Big Island right now and keep hearing this bird starting at 6-7PM every night: https://voca.ro/18XEepbDmpCy. Which bird could it be?
6
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2answers
3k views

What is this feather like bug with no legs?

Seen on leaf in North Texas, USA in April 2017. Critter will attach itself to any object put next to it.
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4answers
2k views

Why don't Australian magpies in Tasmania swoop at people?

I'm currently living in Tasmania (Australia) and I have noticed that Magpies don't swoop at you here, yet they do in other parts of the country. Just wondering: does anyone know why?
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3answers
91 views

What is the primary cause of death for small animals in urban and suburban areas?

Small birds (sparrows, robins, jays, finches) and mammals (squirrels, rats, opossums, raccoons) are a common sight in many urban and suburban communities with green space. However, I observe carcasses ...
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1answer
40 views

Wounded Pigeon in my balcony

There is a, probably wounded, pigeon (common rock pigeon) in my balcony. It is dark right now and thus, I have very little idea about its condition. But it seems it is finding it difficult to fly/move ...
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3answers
144 views

Why are ducks more cautious than pigeons?

In my city park there are mostly two types of bird: Mallard ducks Rock doves (pigeons) When I feed pigeons, they approach me very closely. Sometimes they peck the food that fell on my feet. If I ...
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1answer
2k views

Is this an Emperor Penguin or a King Penguin?

I have a book from Dorling Kindersley called Animal Encyclopedia (the German version that I have is called Das große Tierlexikon) with images from animals. One is titled Emperor Penguin (Kaiserpinguin)...
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0answers
38 views

Why are some bird hybrids fertile?

So, we all know that hybrids are infertile, that's the definition of a species, but how come some parrot species can interbreed and still be fertile. For instance a military macaw and a blue and gold ...
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0answers
15 views

Why do seagulls hit the ground with their feet?

In several occasions I saw some seagulls standing still and pretend as if walking that is they hit the ground with their feet. It always happens on the soil and not for example on the sidewalk. I am ...
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0answers
31 views

Do some birds really clean themselves using wet leaves?

While researching native shrubs to put in my garden for bird habitat, I read that some birds will take advantage of bushes to clean themselves by rubbing themselves against a wet leaf after rainfall (...
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2answers
88 views

What is the nesting period of the European Turtle Dove in middle to southern Italy?

While the breeding period to the north, in Switzerland, seems to be early May until early July, and I have not found any information for the Naples area. Also, are they likely to nest a second time?
3
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1answer
121 views

Identification of Bird feather, probably from a predatory bird

Found in Berlin,Germany Area of Charlottenburg I want to know the species of this bird, someone please tell me. Approximate size 19 cm
3
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1answer
71 views

What is the name of this bird from Tanzania?

I took this picture in late 2018 in Tanzania. The Birds of East Africa book does not include it and I've been unable to identify it looking on the web. Can someone help me identify it, please. Thank ...
2
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1answer
19 views

Source for Specific Models of Birds' Habitat Suitability

This source gives a very detailed analysis of what habitats are best suited for many different species. However, this is a government funded project and, to the best of my knowledge, not published in ...
4
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3answers
140 views

Why are two-winged animals much more common than four-winged?

In flying vertebrates, almost all have only two wings (with the exception of Microraptor and its close relatives). This makes some sense because you need some way to walk also, and a wing isn't very ...
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2answers
168 views

Brood Parasitism - Parasitism/Ammensalism/Commensalism?

Parasitism has the parasite benefitting while the host is harmed. In brood parasitism, the cuckoo lays its eggs in a crow's nest for incubation. How does this harm the host? Why is it not considered ...
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0answers
55 views

How did migrations evolve?

Disclaimer: I know nearly nothing about biology. I was wondering how did the migratory behaviour of birds evolve. Assuming that evolution/natural selection works slowly and gradually (at least most of ...
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1answer
58 views

How are Moluccan cockatoos so loud?

They say a Moluccan cockatoo's screech has a decibel level of around 129 or even more (e.g., 135). That is almost as loud as a jet engine (140 dB at 100 feet). How are they able to emit a screech ...
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0answers
41 views

Is it possible to know the sex of a bird using blacklight?

In the case of birds that have sexual dysformism, is it possible to notice it by illuminating them with blacklight? In my case I have a cockatiel (Nymphicus hollandicus) which is a lutino. They do not ...
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1answer
56 views

Analysing bird diversity data across 2 sites and 2 time periods - Ordinal data. Shannon's and Jaccard?

I am looking for the best way to analyse the data below to measure and compare the bird diversity between 3 sites and across 2 time periods - basically are they different from each other and have they ...
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2answers
87 views

unknown bird in Long Lake Michigan…chocolate brown head and neck, charcoal body and tail, ivory wings, top and bottom [closed]

light chocolate head and neck w/ charcoal body and tail. the wings are ivory white, top and bottom from the body outwards. the colors are clear.....not mixed with other colors. no stripes or spots, ...
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0answers
49 views

Is it impossible for some female songbirds to sing?

I have read that in northern hemispheres, most female songbirds can't sing (for example, the Blackbird). Things are different in tropical regions. Birdsong is for males in some species; it is utilized ...
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1answer
59 views

Can you help identify this bird in Louisville Kentucky?

This bird shows up in my back yard every night. It is calling and sometimes I hear a bird in the distance calling back. I think its an owl but I haven't seen it yet. Any ideas what it is?
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0answers
33 views

What factors have led to selection for intelligence in crows and rooks?

The Corvidae family could include some of the smartest species after primates. What could be the factors that differentiate them from other species of birds that have determined their potential for ...
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2answers
62 views

Can I relocate bird's nest?

Doing a deck project and found a bird's nest. Can I safely move it in order to continue working? Think they'll fledge soon? This is in New Jersey.
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0answers
19 views

Do humming birds eat fruit juice?

I have a fig tree with ripe fruit. There are many birds in it including woodpeckers ( red-bellied ), don't know if he is eating fruit or bugs. The birds have eaten holes many fruits and some juice ...
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0answers
33 views

Why is it (allegedly) dangerous to feed ducks with breadcrumbs and pieces of bread?

I used to go down to the local lake all the time with leftover bread and throw little pieces of it to the hungry duckies, who very eagerly fetched it and ate it while happily quacking away. I thought ...
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2answers
47 views

Do fledglings die if they are not fed constantly?

There is a bird's nest on my balcony in the wall above the door with birds who breed. They have fledglings who already hatched. (I assume this because I sometimes hear quiet sweet chirping.) I sit on ...
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1answer
97 views

Identity of strange bird with fish net tangled around one foot

This bird was photographed at a small beach in Rio de Janeiro, Brazil. What kind of (ocean?) bird is this??
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1answer
37 views

In what “space” does egg mature in Kiwi?

This huge egg here, is it sort of tethered to the ovary, filling up the coelomic cavity, and then exiting out of the infundibulum, or, where is it in the bird exactly? What "space" does it occupy?
7
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1answer
114 views

Why do birds legs' not get frostbite?

In a nature documentary I watched a while ago, there was a scene where a flock of flamingos slept in a lake that froze overnight. Each morning they just had to wait until the lake defrosted ...
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2answers
109 views

Birds brewing beer?

There is a slight bend in the rain gutter next to my window. Over the last 4 years, I observed birds (ravens, magpies and newly doves) to dip their beaks in. I observed ravens to dip what I think was ...
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1answer
138 views
2
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0answers
59 views

Help identifying this bird skull

The skull is 4 to 6 inches long and still has tendons attached. I found this on a beach in central California, which leads me to think it's probably from a seabird. I believe this is from a smaller ...
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1answer
39 views

Why are these nesting magpies building another nest

Pair if eurasian magpies occupy a nest visible from my balcony. It's the nesting season for them here, and I assumed they have laid eggs. I can't see the eggs directly, but one of the magpies has been ...
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0answers
32 views

Why such diversity in sexual dimorphism in passerines?

In searching for info to answer my question, I’ve found a fascinating 1998 article by Owens and Hartley from Proc. R. Soc. Lond. B. It reports such cool findings as that When we break up plumage-...
9
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1answer
14k views

Why are certain baby (water)fowl yellow?

Why are e.g. ducklings, goslings, turkey and chicken chicks (partly) yellow? What is the chemistry background to this? What compounds from the egg cause this to happen? What is the evolutionary ...
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0answers
108 views

Could some identify this bird call? (from the hu - wolf totem)

What species is making this sound? You can hear the sound it makes at the end of the music video: The HU - Wolf Totem
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1answer
154 views

What causes the localization of myoglobin in turkey to regions of muscle tissue?

I've read that myoglobin localization is responsible for the darker colour of leg muscles in turkeys. Why does this localization occur in terms of any of cell biology, molecular biology, or ...
5
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0answers
69 views

Vultures in Germany in the past

I noticed that since the 1970s the bearded vulture , which had disappeared from the Alps due to hunting, has been successfully reintroduced. I have searched for the modern habitats of vultures, but it ...
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0answers
59 views

What happens to male turkeys?

My family and I have almost never seen a wild male turkey though we have seen countless female turkeys. Is the male to female sex ratio of turkeys at birth extremely low? If not, what happens to the ...
0
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1answer
49 views

How difficult is it for wild birds to find food?

This question came to my mind when I was wondering if my parrots would have it better on the outside than with me. Also, is starvation a significant cause of death at different stages in a bird's life ...
5
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0answers
55 views

Are blue feathers better insulators?

I recently found an article talking about the colors of bird feathers. https://www.smithsonianmag.com/science-nature/why-are-some-feathers-blue-100492890/ Apparently, unlike other colors, where ...
2
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1answer
199 views

ID Sunbird in Oman - White, Dark Grey, Yellow

Some extensive web searching has not helped me find this bird I discovered in my travels. They were flitting too fast to get a decent picture, but here is the best description I can obtain from memory:...
11
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2answers
3k views

Why do sparrows jump instead of walk when they are not flying?

I want to talk about sparrows, one of the most common birds around the world. I noticed that when one slowly walks into them (so that they are not frightened enough to fly away), these tiny birds ...

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