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What is a bird beak made of?

Chitin
Keratin
Bone
Mineralized tissue
There are two main types of keratin proteins. The e α-keratins are the main structural components of hair, nails, horns and claws of mammals. The harder β-keratins are found the scales and claws of reptiles, tortoise shells, and in the feathers, beaks, claws of birds.
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Answers by country

Chitin
Keratin
Bone
Mineralized tissue
answers
flagSweden
8%
83%
0%
8%
24
flagGreece
10%
73%
5%
10%
19
flagAustralia
16%
64%
5%
11%
54
flagPakistan
6%
60%
12%
19%
81
flagAustria
18%
59%
9%
9%
32
flagCanada
8%
58%
19%
13%
36
flagthe United Kingdom
14%
56%
12%
14%
192
flagUnknown
10%
56%
16%
16%
48
flagGermany
32%
55%
3%
8%
146
flagBelarus
6%
51%
16%
25%
31
flagPoland
22%
49%
9%
18%
9729
flagIndia
18%
49%
11%
17%
659
flagthe United States
17%
49%
11%
20%
543
flagUkraine
17%
49%
10%
20%
133
flagRussia
15%
49%
18%
16%
111
flagKazakhstan
21%
47%
15%
15%
19
flagNigeria
25%
45%
8%
20%
24
flagSingapore
15%
45%
10%
30%
20
flagMalaysia
11%
44%
7%
33%
27
flagthe Philippines
27%
39%
15%
15%
58

What kind of feeding is crossbill's beak adapted to?

grain eating
insect catching
coniferous-seed eating
chiseling

What kind of feeding is avocet's beak adapted to?

dip netting
surface skimming
scything
aerial fishing

What kind of feeding is bullfinch's beak adapted to?

insect catching
grain eating
coniferous-seed eating
fruit eating

In which country road signs have a yellow background instead of white?

in France
in Morocco
in the United Kingdom
in Sweden