Field notes, v665
Page 451
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Transcription
RESUME - FEBRUARY, 1948 Weather. Continued drought, broken only by light, inconsequential showers on the 6th and 28th. The desert is very dry. The month was also considerably colder than usual, with temperatures in excess of 80° on the 21st and 22nd only. Also, much more wind than usual. Phenological Data. Havasu Lake levels continued low, varying from 45.17 on the 10th to 46.15 on the 1st. Water levels at Topock, in contrast, continued generally high. The Bill Williams River flowed but slightly. Staminate Cottonwood flowers were out on the Colorado River Indian Reservation on the 7th. First Gonethara brevipes in bloom south of Needles on the 17th. Encelia in general bloom, Argemone in bloom on Havasu Lake near Parker Dam on the 21st. First Spanish Bayonet in bloom in Lobecks Pass on the 25th. Willows in bloom, leafing out; cottonwoods beginning to fruit; tent caterpillars active; Lycium in bloom in Bill Williams Delta on the 27th. Highlights of Bird Records. Virtually all of the wintering Canada Geese left in two days' time, on the 18th and 19th. The Lesser Snow Geese lingered a little longer, but were last seen (at least 200) on Icehouse Bend on the 25th. Pintail began migrating in small numbers by the 21st. The early Cinnamon Teal records continued—5 at Beal Slough on the 1st, 5 at Beal Slough and 2 near Topock on the 11th, and 11 near Topock on the 28th. There seemed to be a slight influx of Baldpate during the month. The first migrating Lesser Scaup Ducks were 6 in the Bill Williams Arm on the 21st. Most wintering Common Golden-eyes had departed by the end of the month. The last large concentration of Common Mergansers was seen near Needles Landing on the 10th – about 375. Red-tailed Hawks were common during the month; one was noted on its nest on the west side of Goose Lake on the 28th. Golden Eagles continued to be noted above Topock. A Prairie Falcon was observed killing a Coot just above Needles Landing on the 10th. A Pigeon Hawk was seen at Beal Lake on the 1st. Coot numbers had dwindled on the Havasu Lake Refuge to about 1,500 – apparently the result of disappearing feed, notably Potamogeton and Najas. Compare this to about 12,000 in October! 4 Avocets were seen in the Bill Williams Delta on the 27th, and 2 near Needles Landing on the 29th. A Long-eared Owl was seen in the Colorado River Indian Reservation on the 7th, my first record for the lower Colorado River. First White-throated Swifts, 24 near Topock on the 11th. First definitely identified Costa Hummingbirds, 3 in the Bill Williams Delta on the 27th. First arriving Ash-throated Flycatcher, 1 near Parker Dam on the 20th. First Violet-green Swallows, 10 near Crossroads and 60 in the Bill Williams Delta on the 27th – First Rough-winged Swallow, 1 at Parker Dam on the 20th. First Cliff Swallows, 3 near Crossroads on the 27th, very early. At least 6 Crows still present on the Colorado River Indian Reservation on the 7th. First singing Bewick Wren, 1 at Topock on the 29th. Wintering influx of Robins and Bluebirds continues. 53 Robins seen at Needles