Questions relating to the study of birds.

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4
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0answers
90 views

Birds placing sticks on train tracks?

I live in a semi-rural area in Germany, close to a park which trains go through every 20 minutes. Today, I saw something that left me perplexed. There is a large population of birds that look like ...
3
votes
0answers
68 views

Food Intake versus ability to flee among birds, particularly the hummingbird?

Logically speaking, if a hummingbird drinks too much nectar, it will be temporarily overweight and less able or unable to fly to escape danger. However if the same hummingbird doesn't drink enough ...
2
votes
0answers
32 views

Why don't birds in flocks fly into each other?

I've seen videos of hundreds of birds flying in the same general direction but creating incredible patterns in the sky seemingly instantaneously! How do they all know in what direction to turn at the ...
2
votes
0answers
20 views

Why do hummingbirds build nests with live ferns instead of dead materials?

Hummingbirds prefer to build their nests with spore-bearing ferns, and mosses. This is helpful for the reproduction of the ferns, which are then better able to spread their seeds. But how is this ...
1
vote
0answers
22 views

identification of species of this bird

Hi I saw this bird near my school canteen in Singapore in Spring. Can anyone identify the species of this bird? Thanks in advance!
0
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0answers
26 views

How do the spiralled nostrils of birds of prey help them tolerate g-forces?

I know that such nostrils supposedly stop or reduce the possibility of the bird passing out when diving through the air but how is this achieved specifically? Maintaining ventilation of the lungs and ...