Snakebird vs Cormorant: Info

Anhinga aka "Snakebird"

 Note the spear-like, pointed bill

The body is under water and only the head and neck, hence Snake-like, are above water.

When they dive they tend to just sink under the surface.

Note the limited range in the US.  Luckily we get them year-round.

Anhingas tend to spear fish and impale them on their way to the surface

They then flip their head backwards thereby dislodging the prey into the air.  The bird will then catch it in mid-air, arrange it head first and then swallow it whole.

Double-created Cormorant

 Note the hook on the end of the bill

 These birds grab their prey,

turn it so the head is down (and the spines will flatten) so he swallow the prey whole.

Going!  Going!! Gone!!!

They are the most widespread cormorant in the US

  

They are resident to medium-distance migrants .  Interestingly, Florida, coastal Pacific Northwest and coastal Mexican populations don't migrate.

Compared with the Anhinga, most of the cormorant's body is above water and they tend to dive like a duck, rolling forward.

Cormorants often stand in the sun with their wings spread out to dry.  They have less preen oil than other birds, so their feathers get soaked rather than shedding water like a duck.  Though  this may seem like problem for a bird that spends its life in water, but wet feathers are heavier and probably make it easier for them to hunt underwater with agility and speed.