Archive for the ‘owl’ Category

GET YOURSELF TO ECUADOR

July 21, 2017

PIB has great trips to various habitat zones in Ecuador. And there’s a book you want to take with you. It’s the first-ever, one volume nature guide for anyone headed to Ecuador’s wondrous mountains and rain forest and arid western slopes:
Wildlife of Ecuador:
A Photographic Field Guide to Birds, Mammals, Reptiles, and Amphibians

Andrés Vásquez Noboa. Photography by Pablo Cervantes Daza. Princeton Press. 2017. $29.95.
I wish I’d had a book like this when I was in Ecuador…or even Panama where I got far too close to a pit viper without recognizing it. The bird section is fine but the real value is in all those other critters: face-to-face shots with snakes. It’s the head that matters…look for the heat-sensing pits. You may want to keep your birding guide nearby or back at the ecolodge because only breeding plumage shots are given for most avian species.
Now I know there are two species of agouti in Ecuador and I saw the black in Coca. Not sure even my bird guide knew there were two, certainly didn’t tell us.
Superbly clear range maps. Both English and Latin indices.
My favorite Ecuadoran bird is at the top of page 140…the Collared Inca.
ECUADOR GALLERY FROM MY VISITS:
Yellow-tufted Woodpecker:
Yellow-tufted Woodp.Great Ani:Great Ani2Hoatzin at Sani Lodge:Hoatzin pairSquirrel monkey:squirrel monk on limb
Swallow-tailed Kite over Napo River in Amazon Basin:ST Kite over Napo River

OF EAGLES AND SUCH

July 18, 2017

Harry Fuller writes: Recently a long-time friend, Dr. David Sachs of Palo Alto, sent me a great photo of a fish eagle taking a fish from a lake in Zimbabwe. He asked a little about the eagle and I inadvertently buried him in data.
David, I got your recent note with the action shot of the African Fish Eagle. Kate and I saw this bird several times around the lakes in Uganda. Handsome bird. Yes, the fish eagle would carry food back to brooding mate and then to young after they hatch. The nest would never be left unguarded once the first egg is laid. And the nest has to be protected from such possible nest thieves as Red-tailed Hawks and Canada Geese. Even winter nesting Great Horned Owls are known to steal an Osprey’s nest that has been years in the building. The owls nest even before many Osprey have returned to their nesting territories. Many large birds (storks, eagles and osprey) will usually return to previous year’s nest if they can, and simply repair and remodel. Then young eagles will spend over a month in the nest before they can even begin to try short flights and then they are fed wherever they perch after leaving the nest. To become an adept predator a young bird needs lots of practice and parental support. At least their “college” is free.
The African Fish Eagle is in the same genus as our own Bald Eagle and the White-tailed Eagle of Northern Europe. They are all in Haliaeetus genus. Haliaeetus is a compound of two Greek words, translated literally as “sea eagle.” Our Bald Eagle is not really a “sea eagle,” more strictly a bird of marsh, lake and river though it will fish in quiet salt-water lagoons and estuaries. The fish eagle is smaller than our Haliaeetus eagle and the European one. It is less than thirty inches tall. An adult Bald Eagle will be at least 31 inches tall and the female (which is always the larger of the pair) can be over three feet tall with a wingspan up to 7 feet or more. Our Bald Eagle does fish but in winter often lives on carrion from dead waterfowl as large as swans. This eagle has evolved an immunity to avian cholera and botulism which is handy in winter when large number of migrants waterfowl sicken and die on any over-crowded wintering range.
I have always though the Bald Eagle—contra Benj. Franklin who favored the Wild Turkey—was a perfect symbol for our money-mad country. This eagle will catch its own fish but often uses theft, bullying or simply good luck to find food. Other birds’ diseases leave carrion for eagles, ditto road kills. An eagle pair is great at ganging up on a hard-working Osprey (almost a pure piscine feeder) and stealing its fish. I have also seen eagles take ground squirrel away from Red-tailed Hawks. The Bald Eagle is sort of a hedge fund manager looking to make off with anybody’s else’s hard work or profit for its own selfish good. They are pretty good parents, of course. But among adults there is only begrudged sharing of a carcass. Often one eagle will have found carrion and a coterie of ravens will land just out of reach, waiting for the scraps. The Bald Eagle has one other great strength which is its great strength. It can easily remove bits of frozen deer or goose flesh from a hard-frozen corpse. Some scavengers like ravens and Turkey Vultures lack that strength. Eagles can winter anywhere there is food, fresh or frozen. However, the Turkey Vulture must migrate south to where the nights are warm enough to not freeze a carcass solid. On the Pacific Slope that is generally south of Redding or along the coast. Now, with global warming, a few vultures are wintering in Willamette Valley.
Our other native American eagle is the Golden. It’s a member of the large tribe in the Aquila genus. Aquila is Latin for “eagle” and especially refers to a sharply hooked beak. It is believed that “eagle” derived from old French word “agile” which in turn derived from the original Latin.
Our Golden Eagle has cousins all over the world, most smaller in size. The American Golden females can be up to 40 inches tall. Most of the Old World eagles in this genus are less than three feet and most are some shade of brown with little bold patterning (except the bright white on the Wahlberg’s Eagle). These are birds of mostly open terrain. Our Golden is a specialist in catching jack rabbits and other denizens of our grasslands and prairie. This bird takes talon strength to the max. It can muster several hundred pounds per square inch pressure when it grabs prey. It generally hits prey from behind and kills quickly by crushing the victim. They often nest high in tall trees or on cliff faces in dry areas where there are no trees. Nobody bothers a Golden Eagle in any serious way in daylight.
Two quick stories: I once saw a territorial male Osprey go about trying to drive off a Golden Eagle soaring over a hillside near the Ospreys’ nest. Twice the Osprey screamed and then dove down toward the eagle’s back…each time the eagle flipped over onto its back at the last instant and invited the Osprey to come on down. The eagle’s talons were open and waiting. Each time the Osprey swerved off at the last minute. Those talons would have meant a crushing defeat and death, literally.
A friend in Ashland lives out in the parched, grassy hillsides of the lower Cascades. The Golden Eagle and the Red-tailed both hunt there regularly. A pair of Golden Eagles were nesting on a rocky point uphill from my friend’s house. He often saw the smaller and more agile Red-tails harass the eagles as they hunted, hauled food to the young, built their nest. This is common in avian world—smaller, quicker birds pester bigger, slower predators. I’ve even seen blackbirds go after a vulture which eats only carrion. An angry hummingbird can drive off a huge raven. My friend was out on his hillside planting oak saplings to restore the chaparral that was once there. He saw a Red-tail swoop down the slope and nail a California ground squirrel. Then the hawk tried to get a good grip to haul away its fairly weighty prey. Shortly my friend sensed a big shadow speed by and looked up to see a Golden Eagle hit that Red-tail from behind. Astounded, he watched the eagle tear apart the hawk and the squirrel, fairly efficiently, then fly off. Nothing was left on the ground but shredded bits of both creatures. Apparently the Golden Eagle was settling an old and bitter score.
“Eagle” is an old English word thrown around in naming many unrelated species in the Old World. Some eagles there would be simply big “hawks” here. We would not consider a bird less than two feet tall worthy of that grand a moniker. There are even now birds commonly named “hawk-eagle,” go figure. Perhaps the most striking of the African eagles is the Bateleur, 28 inches tall. In the Old World “buzzard” is synonymous with “buteo,” the genus of our Red-tails. “Vulture” in old world is a group of large predatory birds, not strictly scavengers like our vultures and condors who are actually well-adapted members of the stork family, unrelated to Old World vultures. So it goes in the world of taxonomy vs. common lingo.

Here’s my own shot of a pair of fish eagles perched in a forest in Uganda, taken on an PIB-sponsored trip:FISH EAGLES

THE ENDANGERED GREAT GRAY OWL OF CALIFORNIA

November 4, 2016

The Great Gray Owl has been on the California Endangered Species List for some time.  Current estimates say there may be fewer than 300 of these  marvelous birds in the entire state.  Their modern range is limited. They may once have lived in the Sacramento River Valley but they are now limited to relict populations in scattered bits of suitable habitat in the central Sierra from 1800 to 7000 feet elevation. One recent study of Yosemite, where the birds were first confirmed nesting in 1914, found less than 10 percent of that giant park is suitable GGO habitat. There is also a tiny sliver of the Oregon population that dips across the border into Modoc County north of Alturas. Human alteration of the habitat has not been positive for the Great Gray Owl.  Now climate change just adds stress and more uncertainty about their ability to survive.  Vehicles and Great Horned Owls are lead natural enemies.  Introduced West Nile Virus is a potential game-ender…though so far there is no evidence it has struck California’s population. An Oregon owl in the northeastern part of that state died of West Nile last year.  The GGO is highly susceptible to the disease.bdger2

The most crucial and thorough study of Great Gray Owls ever done anywhere in North America is now completed and has been presented to the California government and the public.  It calls for serious action to help this species survive.  You can click here to read the report and its conclusions.

The research also shows that the central California population has been genetically cut off from more northerly populations for over 25,000 years and should be given sub-species status which in turn could allow federal designation as a national endangered species.  None of the breeding birds along the Pacific Slope south of Canada are migratory.  The Yosemite owls will never meet an Oregon cousin.

OREGON AND WASHINGTON GGOs

Union County and Jackson County in Oregon may each have as many GGOs as the entire state of California.  Yet it is unlikely there are as many of the birds in Oregon as there are people in McMinnville, Oregon (33,000).  We should be aware of what is recommended in California and what gets done and what effects that may have.

Washington State has few Great Gray Owls apparently and only a handful of nesting records have ever been confirmed.  The first one in the state did not come until 1991.

If you are interested in Harry Fuller’s book on this species, click here for the link.

If you really want to see one of these owls, in broad daylight, and not in mid-winter  Minnesota, contact PIB about the birding trip to Oregon.

May 13, 2014

forter1 Forster’s Tern fishing along Metzger Marsh, Ohio.

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eso -monEastern Screech-Owl sleeping.

howr nstHouse Wren at its nest hole.

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Wren on ground hunting for building materials.
howr2 (2)
The five of us here at Magee Marsh’s bird festival from Partnership for International Birding and Neblina Forest Tours had a combined species list of 179. Tomorrow two of us begin leading tour for clients from California, Colorado and Florida–here to see the warblers and their friends.

TIS THE SEASON

March 30, 2014

HOUS-SHPPING
It’s not just about the nest box, but where that nest box is placed. This one happens to be in a patch of oak savannah at about 3000 in the western foothills of the Oregon Cascades. It’s surrounded by open meadow and rolling hills that drop sharply down to a year-round stream. No humans live within a mile of the place and it’s back from the highway. No pesticides, no toxics. Just the sort of neighborhood where you’d raise your family if you were a bluebird.
wb-nst bx1
This nest box is on the fence of a tiny garden behind a row of town houses. It faces a busy sidewalk next to a busier parking lot adjacent to a dog park full of noise-making carnivores. Just the sort of avian slum where you’d expect the hardscrabble House Sparrow to eke out a living on bread crumbs and seeds.
HOSP-NST BOX
This drumming Red-breasted Sapsucker is still advertising for a mate. House-hunting will come later.
RBS-PST1
This pair of Flickers seem well-matched. She sits up and listens to his drumming. What more could a male Flicker ask for? And later in the day I saw them checking out nest holes in Lithia Park, Ashland, Oregon. Location, location…
FLKR-PAIRD
GHO-NESTING1 (1280x960) Look carefully to the left of the female Great Horned Owl. You’ll see the round, white head of an owlet and its dark eye-rings. This is at least the fourth straight year a pair of GHOs have used this nest near Ashland. Whoever first built that nest did a great job; owls don’t build their own nests but “borrow” or squat in what they can find.
MAGEE MARSH
PIB will be present at the Magee Marsh bird festival again in early May. Here are some nest pictures fro last year. This female Woodcock nested in a weedy strip along one side of the very busy parking lot.
woodcock nestShortly after they hatched before a group of wondering birders, mother Woodcock led her quartet of newly dried fuzz-balls into the nearby Magee Marsh woods where they quickly vanished from view.P1570600

Finding a place to raise your children is always emotional. This pair of Ohio Tree Swallows is a case in point.TRSW SCREAM

And, finally, this location seems perfect for Great Blue Herons. It’s at least the third straight year the nest has been used. It sits high in a cottonwood above Neil Creek, facing Oak Knoll Golf Course southeast of Ashland.

GBH-NST1

HERE IN ASHLAND, OREGON, THE KLAMATH BIRD OBSERVATORY IS SPONSORING OUR FIRST-EVER MOUNTAIN BIRD FESTIVAL. IT IS MAY 30-JUNE 1. WHITE-HEADED WOODPECKER, CALLIOPE HUMMINGBIRD, WESTERN SCREECH-OWL, SANDHILL CRANES ON NESTING GROUNDS, BOTH EAGLES, NESTING OSPREY, ACORN & LEWIS’S WOODPECKERS, MOUNTAIN BLUEBIRD AND CHICKADEE, HERMIT AND MACGILLIVRAY’S WARBLER, CASSIN’S FINCH AND VIREO, BAND-TAILED PIGEON, BLACK TERN, RED-BREASTED AND WILLIAMSON’S SAPSUCKERS, GREEN-TAILED TOWHEE, LAZULI BUNTING, AMERICAN DIPPER, WRENTIT, TOWNSEND’S SOLITAIRE–SOME OF THE BIRDS WE EXPECT TO SEE. WITH A LITTLE BIRDING MOJO WE CAN ADD GREAT GRAY OWL, SOOTY GROUSE, MOUNTAIN QUAIL, NORTHERN PYGMY-OWL, SWAINSON’S HAWK, EVENING GROSBEAKAND NORTHERN GOSHAWK.