plot in bioclim model

[acebollada80]

I am currently working with the dismo package in R, specifically utilizing the bioclim function to model species distribution. While exploring the plot function with objects obtained through the bioclim function, I encountered red crosses and green points in the generated plots. However, I'm struggling to understand the significance of these visual elements.

Could someone kindly explain what the red crosses and green points represent when executing the plot function with an object obtained using the bioclim function from the dismo package? Additionally, I'm curious why these red crosses and green points change when modifying the "p" parameter of the plot function.

I'm running
plot(bc, a=1, b=2, p=0.85)
plot(bc, a=1, b=2, p=0.75)

I'm still unclear on the interpretation of the red crosses and green points.
Any insights or explanations would be greatly appreciated.
Thank you in advance for your assistance!