THE FORUM

20-Apr-23, 08:28:39 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
Note: The views expressed on this page are not necessarily those of GVAS or Rfalconcam.
 
  Home Help Search Calendar Login Register  
  Show Posts
Pages: 1 ... 1200 1201 1202 1203 [1204] 1205 1206 1207 1208 ... 1692
18046  Other Nature Related Information / General Nature Discussion / Peregrine falcon fastest of all birds? on: 04-Dec-10, 07:38:48 PM
ONE OF our Epping readers forwarded a few small body feathers that had been plucked by a hawk from the breast of its prey and one tail feather from the attacking hawk that our reader suggested may have been from a harrier. He inquired if I would be able to identify them.

I tend to agree with our reader’s suggestion that a harrier, formerly known as the marsh hawk, could well have been the attacking hawk. The tail feather submitted was basically brown with a thick, black end stripe. It had eight thinner, wavy, horizontal dark stripes alternating with lighter brown under-color its entire length.

This general description might also match a juvenile sharpshined hawk’s tail feather as they are brown in color. Sorry to say I have no idea as to the identity of the partial, downy, plucked body feathers from the hawk’s prey.

The subject of bird feathers is an interesting one. They are of many types that range from bits of down close to the skin to several sizes and shapes of body feathers for additional warmth, and then there are the wing and tail feathers. All birds outlive their feathers in the wear and tear of their lives, thus, feather replacement continue’s throughout a bird’s life. When we look at birds, the feathers we observe most are the larger, outer body feathers of the wings and tail. All feathers are made of protein and the various colors are composed of keratin protein. When a feather is formed and matured, the nutritive material is no longer needed; the sheath splits and falls away or is removed by preening and the feather vane unrolls. With respect to the molt of wild turkeys when their wing and tail feathers have dropped to the ground, male turkey feathers hold their colors longer than do female feathers. That occurs due to the fact that as these turkey feathers develop, the males secret more keratin protein into them than do females. In time, all feathers lose their bright colors quite rapidly and consequently are not as easily noticed as they blend into ground cover.

The flight speed of birds is a subject I have found to be of great interest. Which bird is the fastest? Which is the slowest?

My guess is that the answer to the last question could well be the penguin. Penguins are birds yet they have no aerial life at all. Although they do not fly they do have the reputation as being the best swimmers among birds, even out-swimming many species of fish.

The fastest of all birds is reputed to be the peregrine falcon having reached a speed of over 200 miles per hour. A duck hawk has been reported as reaching the speed of 175 while some sandpipers have been recorded at 110 mph.

The great blue heron cruises at a rather sedate 20 mph; the mallard at about 40. Most small perching birds travel at speeds of between 20 and 30 miles per hour. Hummingbirds, our smallest birds, are swift in flight. They have pointed wings that are swept back like those of a speedy aircraft and similar to falcons, swifts, and swallows. The ruby-throated has been timed out of doors (possibly aided by wind) at 50-60 miles per hour. However, experiments in a wind tunnel by Greenwalt (1960), clocked a ruby-throat at 27 mph. Scheithauer (1967) timed the daily courtship chase of a pair of South American bluethroated sylph hummingbirds at 29.747.4 mph.

During migration the same species of bird may travel at a much faster speed than it would if it was loafing about in its home territory. A bird attempting to escape from the talons of a hungry hawk will increase its speed considerably during the chase.

Edward Howe Forbush, author of several books on birds including the threevolume set, “Birds of Massachusetts and Other New England States,” once told of his experience while riding in a train beside the Merrimack River. He observed that the flight speed of a small flock of mergansers maintained the exact speed of a train (approximately 30 mph) until a loud blast of the locomotive whistle startled them. At that sound the ducks shot forward with a speed that carried them twice as fast as the speed of the train.

New Hampshire.com
18047  Other Nature Related Information / General Nature Discussion / Lily and Hope dig for a den on: 04-Dec-10, 04:54:47 PM
http://www.youtube.com/watch?v=o5WhKqMa9hY&feature=player_embedded Lily and Hope have dug out a den, but leave it and begin another. They abandon that effort when they run into many rocks. Hope digs for grubs in a log.

Courtesy of Lily the bear

We have a Bear hunt here in Jersey starting Monday. They tried to protest but it didn't work. 100-150 Bears will be killed!  Sad 
18048  Anything Else / Totally OT / Re: Funnies from around the interwebs on: 04-Dec-10, 04:24:01 PM
My favorite saying!

Donut seeds.







K, I'm done for now. Ei, ya got me on a roll!
18049  Anything Else / Totally OT / Re: Funnies from around the interwebs on: 04-Dec-10, 04:16:35 PM
Your lipstick? No, I haven't seen it.
18050  Anything Else / Totally OT / Re: Funnies from around the interwebs on: 04-Dec-10, 04:14:24 PM


18051  Other Nature Related Information / Falcon Web Cams / Re: Peregrine falcon in Worcester on: 04-Dec-10, 03:58:35 PM
Bobbin from today
Watching the Gulls
In from the fog.

Great pics from the cam
18052  Rochester Falcons / Falcon Watches / Re: From MAK: Pics from Morning Watches on: 04-Dec-10, 03:23:22 PM
Dec 4. Pics  Sorry, late in posting. See, I do go out! harhar

Beauty on Mercury
Beauty taking off from Mercury. My very first pic of this kind (so exciting for me)  clap
Beauty eating cached food on the Times Square building
Pigeons flying over the river between Main and Broad Street bridges.
More pigeons flying over the river between Court and Broad Street bridges. (Is there a falcon on their tails?)
18053  Other Nature Related Information / Raptor Web Cams / Re: Blackwater Eagles are back on: 04-Dec-10, 07:13:38 AM
The Blackwater Eagles like the Osprey nest. Hanging out there now
18054  Other Nature Related Information / General Nature Discussion / Re: Operation Migration 2010 whooping cranes take off on tenth anniversary on: 04-Dec-10, 07:08:27 AM
Weather stalls training trip of whooping cranes

Ten young but large endangered whooping cranes took off from the Savannah, Tenn., area Thursday to continue their migration training trip behind an ultralight aircraft. Patrick March of Nashville watched and took photos as the Operation Migration pilot maneuvered through the air about 7:30 a.m., making sure all were following. "It's just the most thrilling thing you can imagine," March said.

An eleventh bird, taken Wednesday to the West Meade Veterinary Clinic in Nashville, wasn't among the birds.

The crane had been diagnosed by Dr. Michael Lutz as having an injured wing tendon and wasn't up to a long trip to a Florida refuge by air. He will travel by truck. "This crane will become part of the Whooping Crane Recovery Captive Population and will be sent to a breeding program or to a research or display facility," U.S. Fish and Wildlife spokesman Tom MacKenzie said in an e-mailed statement.

The group, which had been stalled in Tennessee for at least four days because of weather, made it 110 miles, as far as Walker County, Ala., on Thursday. Friday, they flew another 58 miles, to Chilton County, Ala. The cranes, which are 6 or 7 months old, had gone about 813 miles, with another 472 to go.

This is the tenth group of birds to take part in a project led by the Whooping Crane Eastern Partnership, an international coalition of public and private groups that is reintroducing this highly imperiled species in eastern North America.

About 106 whooping cranes exist in the wild in eastern North America because of the efforts, the U.S. Fish and Wildlife Service said.

Three ultralight aircraft and the juvenile cranes are on a route from Wisconsin through Illinois, Kentucky, Tennessee, Alabama and Georgia to reach the birds' wintering habitats at Chassahowitzka and St. Marks National Wildlife Refuges along Florida's Gulf Coast.

"This is more than simply an experiment in wildlife reintroduction," said Joe Duff, senior ultralight pilot and CEO of Operation Migration. "It is a struggle against all odds."



18055  Other Nature Related Information / General Nature Discussion / Re: Swan rescue... one of the good guys! on: 04-Dec-10, 06:43:35 AM
Yay, great story. There are good people out there. Thanks Bobbie!
18056  Other Nature Related Information / Falcon Web Cams / Re: Peregrine falcon in Worcester on: 03-Dec-10, 10:46:08 PM
Bobbins back, night time
Early morning
18057  Anything Else / Totally OT / Snow in the UK on: 03-Dec-10, 10:39:18 PM
They got hit pretty hard already as you can see by this satellite pic.
18058  Anything Else / Totally OT / Re: Pepsi Challenge for our Troops on: 03-Dec-10, 09:42:32 PM
How did that happen? From 70 to 1st in one day?? Whoa!!  2thumbsup
18059  Other Nature Related Information / General Nature Discussion / Re: Scenes from my backyard on: 03-Dec-10, 07:13:18 PM
Ei, your deer are very dear! Thanks
18060  Other Nature Related Information / General Nature Discussion / A Red-tailed Hawk preys on a squirrel in front of a gathered audience on: 03-Dec-10, 06:52:42 PM
http://www.lsureveille.com/gallery-a-red-tailed-hawk-preys-on-a-squirrel-in-front-of-a-gathered-audience-near-david-boyd-hall-1.2419036  Too late, I looked...pretty gross. I didn't know. sick

Pages: 1 ... 1200 1201 1202 1203 [1204] 1205 1206 1207 1208 ... 1692
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Sponsored By

Times Square
powered by Shakymon