Agents and elements

Here is my initial brainstorming for agents and elements that could play a role in my model (if it ends up being agent-based):

Adult Terns:

necessary actions
fish
feed young
feed self
feed each other
guard nest
idle

optional* actions
incubate
copulate
court
fight

necessary properties
nest (identify which nest)
fish (boolean, or possibly more descriptive about fish type/size)
location

optional* properties
chicks (optional because this could be identified by looking at which chicks have the same nest as this tern)

Adult Gulls:

necessary actions
fish
hunt for terns
feed self
feed young
idle

optional* actions
none

necessary properties
none

optional* properties
nest

Tern Chicks:

necessary actions
feed
idle
wander

optional* actions
beg

necessary properties
nest
fitness/health

optional* properties
none

Nest Scrapes:

necessary properties
none

optional* properties
location
occupied (boolean)

Colony:

necessary properties
nests
gulls
terns

optional* properties
terrain (grass, etc.)

*optional: may or may not be included in the model because I am not sure if it is necessary.