Well, it's most likely to be us humans. Tearing down their habitat's, taking their water, and taking the lives of these bird by capturing them.
Blue herons and the Lesser Blue Herons are prevalent where I live. They like shallow fresh water ponds or lakes where there are a lot of fish for them to eat. Since herons hunt by sight, murky water is not very helpful for them, as they cannot see the fish.
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Babies that come from blue herons
Babies that come from blue herons
Great blue herons are grayish blue and have a thick dark caplike marking on their heads while white herons are completely white.
Herons eat fish.
Cat tails, blue gill fish, lady great blue herons and stuff like that
Yes.
more of a grayish color
No.
The Great Blue Herons eats small fish, such as shrimps and crabs
In general, ducks and blue herons do not interact much with each other unless there is competition for resources such as food or nesting sites. Blue herons are known to be aggressive towards ducks if they feel threatened or if they perceive them as competition. Ducks may try to avoid blue herons to minimize conflict.