Questions tagged [ornithology]

Questions relating to the study of birds.

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9
votes
1answer
58 views

Do Scrubjays weigh peanuts by picking them up?

I have been feeding scrubjays where I live (Monterey, California) with peanuts in the shell. Something interesting I've noticed them do is, after I've laid out a selection of peanuts for them, they ...
8
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0answers
153 views

Identification of an animal building

I live in south-west Germany and today while mowing the lawn I discovered a strange structure. It looks like a molehill on which additional branches were placed. This kind of branches are easy to find ...
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0answers
44 views

Can anyone tell me what species this baby bird this is?

Can anyone tell me what species this baby bird this is? He or she is less than two weeks old. Fell out of nest. He is doing well. I live in Sacramento Ca, Thank you.
0
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0answers
55 views

What is happening with this hummingbird and how can I help him?

Today I noticed a hummingbird next to my feeder (California) which looks very strange. From my observation it seems that something sticks from its head. This thing is rigid (does not look like a ...
1
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0answers
25 views

Do penguins “test the ice”?

Do penguins have a way to test the ice that they stand on to ensure that the ice will not break? In other words, do penguins make sure that they will not fall into the ice before stepping onto it? I ...
0
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1answer
66 views

Why are the shells of birds' eggs fragile but not those of other creatures?

In my limited understanding, eggs of oviparous creatures other than birds have a flexible outer membrane. Is there any obvious reason that bird eggs should have fragile shells? Notes I'm asking why ...
-1
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1answer
39 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!
-1
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1answer
48 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?
9
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2answers
2k views

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.
0
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1answer
46 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 ...
0
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0answers
41 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 ...
0
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0answers
17 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 ...
3
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1answer
75 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 ...
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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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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 ...
0
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0answers
37 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 ...
0
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0answers
20 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 ...
0
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2answers
65 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
35 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 ...
0
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3answers
92 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 ...
0
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2answers
52 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 ...
0
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1answer
101 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??
1
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1answer
41 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
116 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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0answers
39 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 (...
0
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1answer
88 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 ...
2
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0answers
60 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 ...
1
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1answer
83 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-...
-1
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1answer
57 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 ...
1
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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
134 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
4
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3answers
148 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 ...
1
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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 ...
1
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0answers
50 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 ...
1
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0answers
60 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
50 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
57 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 ...
-3
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2answers
112 views

What's the name of this bird species?

What's the name of this bird's species, please?
5
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1answer
114 views

Where are all the seagull nests?

Seagulls are common. I live on the shore of New Jersey (U.S.), but I have never seen a seagull nest. Where are they?
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0answers
61 views

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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0answers
53 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....
3
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1answer
187 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 ...
0
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0answers
112 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 ...
1
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0answers
13 views

Do ringneck parrots reject eggs of other parrots in their nest / eggs touched by humans?

I've put up artificial parrot homes in my terrace. Parrots have been nesting there and have laid eggs in them. Of late i have been observing a large gathering of crows and a few hawks perching in the ...
0
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0answers
114 views

Chickpeas as feed for house sparrows , ringneck parrots?

I've put up a bird feeder outside my house, and so far I have been feeding uncooked white rice , and the birds seem to enjoy them. However, since I read somewhere that a variety should be ...
3
votes
1answer
61 views

How does taxonomy work? The case of the Avian Dinosaurs

I recently discovered that the class Aves (or Birds) has been renamed Avian Dinosaurs. My question is when this taxonomic denomination achieved the consensus of the scientific community and through ...
0
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2answers
89 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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