eggs
I would assume they are placed in the poultry or birds group.
If not controlled, birds can cause damage to structures, break windows, and cause other problems. My parents' house had plastic hawks on all the windows to keep birds from running into them, for instance. To keep pest birds like pigeons from making your home or building their home. Bird droppings can carry diseases and erode building materials. It is best to get rid of the birds before they become a big problem.
a device placed outdoors to supply food for birds
A birdfeeder is a device placed outdoors to supply food for birds.
Birds mate after and before making a nest
Because all birds are animals (not plants).
Ice burgs and birds
The Liver Birds
How: By building a nest. Why: To live in and raise their kids in.
There are many ways to keep birds out of and off of a building, make sure outtake vents and chimneys are clean and clear of nests, install wire net on rafters so birds can not land to make a nest and there are roof spikes that work to keep birds away. The most humane way to get rid of birds is using a bird sound recording that can deter birds from hanging around for blocks.
for building things and for resources
Chickens are pretty much placed near most farms around runescape, and theres birds ( cant be attacked ) at all hunter grounds.