Pexels / Magda Ehlers

The Jacaranda is popular with urban planners because of its “pavement friendly” roots.

Blue-Blossoming Jacaranda Trees have already produced a first wave of color along the streets of San Diego. By early or mid-May, warm weather permitting, this Brazilian import could put on a dazzling show. The larger jacarandas, which in full bloom are leafless, or nearly so, display myriad delicate, trumpet-shaped blossoms — a lavender haze when seen from afar. Jacarandas are commonly used as landscaping in parks and on most college campuses. A fine row of jacarandas graces Ash Street downtown.

Black locust trees bloom in mid-to-late spring with fragrant white flowers.

Wikimedia Commons/Cephas

The Tall Locust Trees planted years ago along Julian’s narrow streets are once again brightening this backcountry (and former gold-rush) town with blossoms of white, pink, and lavender. Introduced into the West by 19th-Century emigrants, locust trees have become almost a trademark of California’s gold country, from the Mother Lode south to Julian.

The Silk Oak Tree is not an Oak but is in the Grevillea family and gets its name from the silky feel of the leaves and when cut, the grain resembles English Oak.

Wikimedia Commons/Bidgee

The Silk Oak Tree, a fast-growing import from Australia, comes into short-lived glory this month. Golden flower clusters decorate the silvery-green branches, an effect that is particularly stunning when seen in contrast to the blue-blossoming jacaranda trees often planted nearby. A common tree in San Diego-area parks, the silk oak is also a popular street and backyard tree in the older residential areas.

There are two distinct subspecies of yellow-rumped Warblers, the eastern white-throated Warbler and the yellow-throated Warbler in western North America.

Wikimedia Commons/Wildreturn

Land Bird Migration is in full swing this month in San Diego County, with warblers and flycatchers among those most commonly seen. Warblers crawl along tree limbs and branches to dine on their favorite insects, while flycatchers, as the name suggests, catch their meals on the wing. Riparian areas such as the San Diego River through Mission Gorge and Marian Bear Park in San Clemente Canyon are favored by both birds and birdwatchers.