Often species endangerment is attributable to a single cause. 

The immigration rate (colonization rate) of a distant island is affected most by what 2 factors?  

Bird species that exhibit sympatric polymorphism (currently or in the recent past) include all EXCEPT:

Dominant individuals have more fat because they have access to the best food resources.

Define Sink. 

Match the following questions with the answers below.

In its simplest form commonly used by lay people (i.e., the grandmother test), species diversity (or biodiversity) is often equated with: 

In a community of birds the class sampled during a field trip, we recorded 7 different species, each with 13 individuals (abundance).  Could a reasonable person (i.e., an average UMC ornithology student) mentally and easily calculate without paper, pencil, or calculator the following terms:

Name and explain 3 techniques/strategies that birds use to reduce their brood size to match the resources available in the environment (this is often called ‘brood reduction’).

You are directing a project to sample and characterize the bird community at Old Mill State Park (a small, local state park).  Clearly you could sample 1000 plots and have ample data to do so; but you do not have the time, energy or money to sample that intensively.  How will you know how many plots to sample?  I.e., how do you know when you have sampled enough plots to detect and record most of the species richness but have not wasted your time by sampling too many plots unnecessarily?