Birding at the University of California Botanical Garden
By Chris Carmichael
With one of the richest plant collections in the United States, the University of California Botanical Garden (UCBG) offers birders in the Bay Area a range of unique birding opportunities. Located in Strawberry Canyon in the hills above the UC Berkeley campus, the UCBG plant collections are arranged in a biogeographical manner (California, Mexico and Central America, Australasia, etc.), with an emphasis on plants from Mediterranean climates of the world, including, prominently, the flora of California.
It’s interesting to see how our native birds adapt to the worldwide flora represented in the garden. Hummingbirds are a prime example. There are many hummingbird-pollinated flowers in the Californian, South American, and Mexican and Central American Areas, and our two commonly encountered hummingbird species, Anna’s and Allen’s, readily visit plants such as salvias that occur in these areas. But, they also visit tubular flowers from around the world, including plants from Southern Africa that are sunbird-pollinated in habitat, such as aloes and certain flowering bulbs. Another example is Melianthus major, the honey bush, from South Africa. This plant produces copious amounts of nectar, and is visited by a wide array of native birds, including Black-headed Grosbeaks, Hooded Orioles, Golden-crowned Sparrows, and Yellow-rumped Warblers.

Between its diverse plant life, and edges created by transitions from one garden area to another, the botanical garden is appealing to many different bird species. This is an example of the ecological concept of “the edge effect”, where changes in population or community structures occur at the boundary of two or more habitats. Edges are often species rich, and the Garden provides a microcosm of this kind of environment. Permanent water features, including the Japanese Pool and several tributaries of Strawberry Creek, draw in water birds, although few stay for very long.
You can see a typical range of migrants in the UCBG during the spring and fall. Lazuli Buntings are dependable in the spring, and Rufous Hummingbirds are typical during early fall (and late summer) migration. During breeding season you’re likely to find Black-headed Grosbeaks and Warbling Vireos in small trees throughout the UCBG, Olive-sided and Pacific-slope Flycatchers in the redwoods that shelter the Asian Area, and Hooded Orioles in the fan palms around the conference center. Moist creek courses throughout the UCBG are good places to look for Wilson’s and Orange-crowned Warblers, Pacific Wrens, and Swainson’s Thrushes with their ethereal song.…