S. Coccinea from South Dakota

My first venomous snake: South Carolina copperhead

Lizard sex is what this is. The male, who's green right now (they can easily and quickly change), is showing his red-throat pouch, which he uses to intimidate rivals

Wind pollination is a risky business but where I live most trees have to rely on it. These Box Elder (Acer negundo, a maple) anthers are almost ready to pop and start metaphorically tossing handfuls of pollen into the wind, trusting that somehow they will find the female flowers on a different tree

A Song Sparrow giving it all he's got to tell his neighbors that this territory is occupied, a sort of musical No Trespassing sign. Imagine if a human's most brazen defense was to sing a beautiful melody