Algae is not a recommended food for rabbits, although there isn't much information available about it. Some forms of blue-green algae are known to be toxic to rabbits (see link below). It's possible that a rabbit might eat algae, but that doesn't mean it's safe for them to eat because pet rabbits have lost many of their natural instincts, and will often gladly eat poisonous foods, and wild rabbits have not developed any instincts about foreign foods.
There are so many plants that are safe and healthy for rabbits that most experts advise sticking to what we know is safe. If you do feed your rabbit an unknown plant, always (1) check it on a list of known toxic plants (see the link below), and if it's not on the list then (2) start your rabbit on very, very small portions - just a taste. Do this for a couple of days, then wait a couple of days before trying again - and this time you can increase the portion size slightly. Proceed in this very slow and gradual manner. Pay very close attention to your rabbit's health and be prepared to rush to the vet's if something is wrong.
See the related questions below for info about rabbit food and nutrition, and health and illness.
Plankton is not recommended for rabbits. See the related question below for info about the rabbit diet.
I'm not sure, but fish eat plankton.
Foxes, and raccoons eat young mallard ducks. Snapping turtles will also eat them. Mallard duck eggs are eaten by snakes, and crows.
You can eat eggs from any type of duck, it is illegal to in any way kill a wild mallard duck. You can only eat domesticated mallard ducks or their eggs.
A box of quackers
No, they do not nurse from their mothers.
Mallard ducks prey on insects, fish, aquatic insects like mosquito larvae and frogs. They also eat eat fruits like berries and usually if available half peeled apples and they also eat aquatic plants like weeds.
No.
Foxes, and raccoons eat young mallard ducks. Snapping turtles will also eat them. Mallard duck eggs are eaten by snakes, and crows.
Yes.
yes they do
No.
Ducks will eat plankton and algae but prefer other things. Some of the things they eat are bread, fish, crayfish and berries.
You can eat eggs from any type of duck, it is illegal to in any way kill a wild mallard duck. You can only eat domesticated mallard ducks or their eggs.
Mallard ducks are omnivores. They eat invertebrates, fish, plants and amphibians.
Mallard ducks are omnivores. They eat invertebrates, fish, plants and amphibians.
yes baby duck's can eat corn but not corn on the cobb.
If the result you want is a mallard, yes. If mallards can just breed with other ducks, yes, a mallard duck can breed other breed ducks.
Mallard ducks are not capable of changing gender. There is no known species of duck that is capable of that.