Straneck's tyrannulet (Serpophaga griseicapilla) - 20Aug2022

Straneck's Tyrannulet is also known as Grey-crowned Tyrannulet which is a much better name.  I am for descriptive names every time although in fairness the Plain Tyrannulet and Straneck's Tyrannulet both have gray crowns too.  Luckily this one photographed below in the Pantanal was IDed based on it's call.