I don't know what this is on my oak tree, but is it anything I should be concerned about? Should I spray with something?

Weather is the other big determinant. A wet spring can create the right conditions for the blooming of many oak flowers, known as catkins and coons, a good sign of higher acorn numbers. On the ...

"This work uses black and white to add something special ... "On a misty morning in May, the presence of a pair of iconic oak trees was amplified by backlit sunshine and partly framed by the ...