/sci/ - Science & Math

Any biologist here?
Im and undergrad student who is studying biology, and we have this course where they are going to throw us into the wild for 1 day to make up an study about ecology, but i can't get an idea to what would be interesting to observe and study, given the time (no more than 6 hours) and lack of instruments (copybook and eyes). Because is ecology they tell us they want to see interactions between species, or types of distribution among them, but i have been thinking calculating diversity or species richness with an independent variable may be enough. Anyone would like to recommend me something to do?