The butterfly appears to be a hybrid between two known tiger swallowtail species — P. glaucus and P. canadensis — but because ...

greenish-gray caterpillars that go through an astonishing transformation. Then, around the summer solstice, they emerge. From the black cocoons, yellow and black striped butterflies spread their ...

Spring officially starts on March 20, but warm weather and blooming flowers usually come early in Arizona. Here's how you know it's springtime.

Webs on the leaves and greenish-yellow caterpillars are likely to ... Common in rainy weather, two fungi cause the problem: both make the leaves turn brown, and one also leads to black streaks on ...