def speciesSelector(self, parent):
    """Creates the Species Selector"""
    #tracks previous button color
        self.color_prevButton = None

        #Frame to hold buttons for species types
        self.speciesButtonsToolbar = Frame(parent)
        self.speciesButtonsToolbar.pack()

        #species Buttons
        self.blankButton = ButtonCreator(self.speciesButtonsToolbar, \
                            "Blank", callback = self.blankButtonClick, \
                            width = 10, background = "White")
        
        self.studentButton = ButtonCreator(self.speciesButtonsToolbar, \
                            "Student", callback = self.studentButtonClick, \
                            width = 10, background = "lightblue")

        self.profButton = ButtonCreator(self.speciesButtonsToolbar, \
                         "Professor", callback = self.professorClick, \
                           width = 10, background = "red")
        
        self.squirrelButton = ButtonCreator(self.speciesButtonsToolbar, \
                            "Squirrel", callback = self.squirrelClick, \
                            width = 10, background = "green")

        self.fmButton = ButtonCreator(self.speciesButtonsToolbar, \
                        "FM", callback = self.fmClick, \
                         width = 10, background = "yellow")
        
def blankButtonClick(self, event = None):
    self.color_prevButton = "White"

def studentButtonClick(self, event = None):
    self.color_prevButton = "lightblue"        

def professorClick(self, event = None):
    self.color_prevButton="red"

def squirrelClick(self, event = None):
    self.color_prevButton="green"

def fmClick(self, event = None):
    self.color_prevButton="yellow"