Скачать или смотреть What is the purpose of having a crest?

Bird crests are eye catching, interesting and fun. But what is the purpose of having one? In this video I explore the purpose of crests and offer a few interpretations of crest position.

Chapters:
Introduction 00:00
Which birds have crests? 00:17
Purpose of crests 00:34
Raised crest 01:03
No crest, no problem 01:38
Lowered crest 02:01
Exceptions to the rule 02:24
Crest questions to ponder 02:49
Conclusion 03:16

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Photos and video sources:
Canva.com
https://www.canva.com/policies/free-m...

Flickr.com
https://www.flickr.com/creativecommons/

Pexels.com
https://www.pexels.com/license/

Videvo.net

Credits in order of appearance:
All credits from Canva.com unless where noted
Introduction
-Scarlet tanager by pascalmarchand
-Northern cardinal by mlharing

Which birds have crests?
-Blue jay by JasonMacKenzie
-Northern cardinal by BrianEKushner
-Tufted titmouse by Lightwriter1949
-Sulphur-crested cockatoo by Terri Ayliffe
-Eurasian hoopoe by IMNATURE
-Victoria crowned pigeon by Zzvet
-Secretary bird by WLDavies

Purpose of crests
-Cockatoo and African grey parrot by luamduan
-Tufted titmouse by ReddyLock
-Blue jay close up by pascalmarchand

Raised crest
-Female red-necked woodpecker by BlackBoxGuild from Videvo.net
-Blue jays fighting by Janet Griffin-Scott
-Hooded mergansers by teyi from Pexels.com
-Galahs on branch by JohnCarnemolla
-Galah head bob by JohnCarnemolla

Lowered crest
-Sulphur-crested cockatoos by BlackBoxGuild from Videvo.net
-Northern cardinal by JamesBrey
-Blue jay on nest by Andy Reago & Chrissy McClarren from Flickr.com

Exceptions to the rule
-Northern cardinal in snow by Harry Collins
-Northern cardinal pair by Robert Thomopson
-Northern cardinal pair by Irving A Gaffney

Crest questions to ponder
-Belted kingfisherby skibreck
-Maps of North America and Europe by SpaceStockFootage
-Flock of galahs on grass by JohnCarnemolla
-Harpy eagle by pascalmarchand

Conclusion
-Pileated woodpecker by BlackBoxGuild from Videvo.net
-Sulphur-crested cockatoos by JohnCarnemolla

Thumbnail photo credit: Sulphur-crested cockatoo by Ken Griffiths