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 96 THE CONDOR I VOL. VIII sites. In one place there were a number of California woodpeckers' holes in a tall dead sycamore. Here we found three pairs of martins fluttering in and out of the woodpeckers' holes and if their ceaseless twittering was any expression of their feelings they must have been exceedingly well pleased with their new domiciles. The following is a list of the land birds that were identified. The sea-birds, waders and ducks are not incorporated in this list because those that were identi- fied were not particularly noteworthy and because the identification of several species was unsatisfactory. Lophortyx californicus vallicola. Valley Quail. Very rare in 9o4, but bred abundantly in 9o5 and 9o6, when the rainfall was copious. Zenaidura macroura. Mourning Dove. Common, especially in 9o6. Cathartes aura. Turkey Vulture. Common everywhere all the time. Accipiter cooperi. Cooper Hawk. Not common; two were seen during the last week in March, 9o 5. Buteo borealis calurus. Western Red-tail. Was found breeding very com- monly in 9o5 and 9o6. Buteo lineat,,s elegans. Red-bellied Hawk. Several pairs seen and two nests located. Aquila chrysaetos. Golden Eagle. A single individual was seen in March, 9o5 Falco peregrinus anatum. Duck Hawk. One pair found nesting on March 28, 9o6. Falco sparverius. American Sparrow Hawk. Breeds very commonly in the sycamores. $trix pratincola. American Barn Owl. Common; two nests were found con- taining young in March, 9o5. Scops asio bendirei. California Screech Owl. Only three individuals were seen. Asio magellanicus pacificus. Pacific Horned Owl. Rare in i9o5, but four pairs were found breeding in I9O6. Speotyto cunicularia hypogaea. Burrowing Owl. Not common; only two pairs were seen. Geococcyx californianus. Road-runner. Single individuals were seen on May 29, I9O4, and on March 28, I9O6. Dryobates nuttalli. Nuttall Woodpecker. Very common in the elder bushes where they breed. Melanerpes formicivorus bairdi. California Woodpecker. Not common; a Jew pairs bred in the sycamores. Colaptes cafer coilaris. Red-shafted Flicker. Common in the sycamores where they bred. Chordeiles acutipennis texensis. Texas Nighthawk. Abundant about the marshes from May 27 to 3, I9O 4. Aeronautes melanoleucus. White-throated Swift. Several pairs were seen near the duck hawks' nest in I9O 5 and 9o6. Trochilus alexandri. Black-chinned Hummingbird. Quite common in the sycamores May 27 to 30, I9O4. Selasphorus rufus. Rufous Hummingbird. A single male, evidently a migrant, was seen on March 3, I9O5. Tyrannus verticalis. Western Kingbird. Breeding commonly in the syca- mores in May, t9o4.