A Texas Native Recovers

 Not long before the first European (Viking) explorations in North America, condors were still present in Texas.

As published by U. S. National Museum, Washington, D. C., November 2S, 1932, ALEXANDER WETMORE and HERBERT FRIEDMANN found condor bones in a cave on the south peak of Mule Ears Peaks, ten miles north of the Rio Grande in Brewster County, Texas (approximately 29”lO’ n. lat., 103”26 w. long.), during the spring of 1932. They found twenty-seven bones and fragments of bones of the California Condor, Gymmogyps califwnianus. They were from at least three and possibly more individuals. The best-preserved specimens were four tarso-metatarsi, three in perfect condition. One metatarsus is from a young bird barely old enough to fly-indication that condors nested in this vicinity. The age of the deposit is estimated from the archeological remains at from 1600 to 3000 years. Mr. Setzler said that there was another, but inaccessible, cave one hundred or more feet above the one that yielded these bones, and that it appeared to contain an extensive deposit also; it is quite likely that it may eventually be found to contain more condor material.

The authors continued, “This is another link in the evidence of the transcontinental range of the condor in ancient times. Living today (1932) only in the mountains of southern California and northwestern Lower California, remains were found in a cave fifty miles west-northwest of Carlsbad, New Mexico, in Conkling Cavern, New Mexico, by Howard (Science, April 4, 1930, p. xiv), from Gypsum Cave, near Las Vegas, Nevada, by Miller in fossilized condition from Pleistocene deposits in Florida (Hog Creek near Sarasota, and the Seminole area). The present (1932) lot of bones comprises the first indication of the former existence of this bird in Texas, and it is the largest number of specimens yet taken anywhere outside of the present range of the living bird. The abundance of the bones clearly indicates that the species was no mere incidental visitor in the Big Bend region of Texas a couple of thousand years ago.”

 

NOTE: this post was originally posted to NPS.org (National Park Service)

Condor Re-introduction & Recovery Program

Why did Condor Numbers Decline?

Today, the California condor is regarded as one of the rarest birds in the world. In Pleistocene times, condors ranged from Canada to Mexico, across the southern United States to Florida, and north on the east coast to New York. During that period, condors were a common resident of the Grand Canyon judging by bones, feathers and eggshells found in caves where they once nested. A dramatic range reduction occurred about 10,000 years ago, coinciding with the late Pleistocene extinction of large mammals such as mastodons, giant ground sloths, camels, and sabre tooth cats that condors fed on.

By the time Europeans arrived in western North America, condors had retreated to a stronghold along the Pacific coast from British Columbia to Baja California. The birds managed to maintain a strong population until shooting, egg collecting, poisoning by cyanide traps set for coyotes, power line collisions, general habitat degradation, and especially lead poisoning began to take a heavy toll. Lead poisoning from ingesting fragments of lead ammunition in the carcasses and gut piles they feed on remains the greatest threat to California condors today.

From the 1880s to 1924, there were scattered reports of condors in Arizona. But by the late 1930s, no condors remained outside of California and by 1982, the total population had dwindled to just 22 birds. Extinction loomed.

What’s Being Done to Save the Condor?

As a result of the continued downward spiral of the condor population, one of the longest wildlife recovery efforts ever attempted began. The California condor was placed on the federal endangered species list in 1967. Critical habitat was identified and mortality factors were studied.

The U.S. Fish and Wildlife Service began a captive breeding program in 1983, teaming with the Los Angeles Zoo and the San Diego Wild Animal Park. (Additional breeding facilities were added later at The Peregrine Fund’s World Center for Birds of Prey in Boise, Idaho and at the Oregon Zoo in Portland, Oregon.) But in the wild, condor numbers continued to decline until by 1985 only nine wild birds remained

A controversial decision was made to bring all remaining condors into captivity, and the last wild bird was captured on April 19, 1987. All hope for recovery was now placed on the captive breeding program and the task was formidable.

Condors aren’t capable of reproducing until they are about six years old and once a pair mate, only a single egg will normally be produced every year or two. Because of these factors, recruitment into the population is very low. To offset this, captive breeding techniques were developed in which eggs are removed as they are laid, usually causing the captive condors to lay a second and sometimes a third egg.

The extra eggs are incubated and the chicks are raised by caretakers using a hand puppet shaped like a condor head. The puppet prevents the young condors from imprinting on people, a phenomenon in which a bird will identify more with humans than its own species. Some condor chicks are also allowed to be raised by their parent birds. As a result, the captive condor population increased dramatically from 27 birds in 1987 to the 177 or so that are currently being held

Best of all, captive bred condors were being released back into the wild in California beginning in January 1992. Today, more than 127 condors fly free in the state of California, from the Ventana wilderness and Pinnacles National Monument down to the Sespe Condor Refuge and Los Padres National Forest north of Los Angeles.

In December of 1996, six young captive-bred condors were released into the wild in Arizona by The Peregrine Fund from a site in the Vermilion Cliffs, 30 miles north of Grand Canyon National Park. For the first time since 1924, condors were flying free in Arizona skies. Subsequent releases have occurred every year since then.

In October of 1992, three condors were released into the wild on the Baja peninsula of Mexico. It was the first flight of California condors there since 1937.

The world total of California condors today is around 400, more than half of which are in the wild. Although still endangered and facing ongoing challenges such as lead poisoning, they’ve come a long way since numbering just 22 in 1982.

Posted by Chris Gill

Ranching, wildlife management, finance, oil & gas, real estate development and management.

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