Why are female raptors bigger than males?

In the majority of species of raptors (birds of prey), the females are bigger than males. What might be nature's reason for this size reversal? In this video I explore three hypotheses that scientists have come up in response.
Chapters:
What is a raptor? 00:00
The short answer 00:37
Hypothesis 1 00:39
Hypothesis 2 01:06
Hypothesis 3 01:31
Conclusion 01:54
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Photos and video sources:
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Credits in order of appearance:
What is a raptor?
-Peregrine falcon watching squirrel by Harry Collins from Canva.com
-Barn owls by RockfordMedia from Canva.com
-Burrowing owls by Dan Rieck from Canva.com
-Female juvenile red-tailed hawk by milehightraveler from Canva.com
Hypothesis 1
-Eurasian buzzard by Suratoho from Canva.com
-Great horned owl and owlets by Harry Collins from Canva.com
Hypothesis 2
-Red-shouldered hawk by jamesbenet from Canva.com
-Barred owl pair preening by Rick Ray from videvo.net
Hypothesis 3
-Peregrine falcon pair on cliffside by Harry Collins from Canva.com
-Bald eagle pair in tree by skibreck from Canva.com
Conclusion
-Bald eagle close-up by Purplevideos from Canva.com
-Red-tailed hawk close-up by Oleger from Canva.com
Thumbnail credit: Burrowing owls by Dan Rieck from Canva.com

[@BornFreeFilms]

Thanks for another informative video.

[@corbechupacabra]

There is a nesting pair of bald eagles a few miles from me and you can very easily tell which is the female and which is the male.

[@jeffolson4731]

Great video. The 3rd hypothesis sounds the most reasonable to me.

[@allthingsbirdie]

I think so too!

[@emiliawoskowiak7140]

I think there is another reason while raptor's female are bigger than male. Beacuse generally females spend most of the time incubating and than mostly brooding, so bigger female body protects hatchlings better from elements and keep them better warm🤗🌝🌨🌞⛈❄☂

[@allthingsbirdie]

That is an excellent idea and it makes a lot of sense!

[@marlyndonnelly2206]

For the female, I always thought it’s easier to bear the lesser weight during mating. For the male, a sturdy female can help with balance. The better the balance the more successful the mating.

[@adorable_happycats]

God our Holy Father in Heaven created these wonderful bird's.