Many dinosaur footprints discovered in the USA


This video from the USA is called A visit to a museum in St. George Utah featuring dinosaur tracks.

From LiveScience:

Huge Field of Dinosaur Tracks Found

By LiveScience Staff

posted: 20 October 2008 11:56 am ET

More than 1,000 dinosaur footprints along with tail-drag marks have been discovered along the Arizona-Utah border. The incredibly rare concentration of beastly tracks likely belonged to at least four different species of dinosaurs, ranging from youngsters to adults.

The tracks range in length from 1 to 20 inches (2.5 to 51 centimeters).

“The different size tracks may tell us that we are seeing mothers walking around with babies,” said researcher Winston Seiler, a geologist at the University of Utah.

The tracks were laid about 190 million years ago in what is now the Vermilion Cliffs National Monument.

“There must have been more than one kind of dinosaur there,” said researcher Marjorie Chan, professor and chair of geology and geophysics at the University of Utah. “It was a place that attracted a crowd, kind of like a dance floor.”

While the site is covered in sand dunes now, the researchers say the tracks are within what was a network of wet, low watering holes between the dunes. In fact, the tracks provide more evidence of wet intervals during the Early Jurassic Period, when the U.S. Southwest was covered with a field of sand dunes larger than the Sahara Desert.

Chan and her colleagues, including Seiler, described the dinosaur track site in the October issue of the international paleontology journal Palaios.

By studying the shapes and sizes of the tracks, Seiler suggests four dinosaur species gathered at the watering hole, though the researchers have yet to match the prints with specific species. Currently, the tracks are named for their particular shapes and include:

* Eubrontes footprints measure 10 to 16 inches (25 to 41 cm) long and have three toes and a heel. These tracks likely were made by upright-walking dinosaurs with a body length of 16 to 20 feet (5 to 6 m), or smaller than Tyrannosaurus rex.
* Grallator tracks are about 4 to 7 inches (10 to 18 cm) long, are three-toed and were left by small dinosaurs only a few feet tall.
* Sauropodomorph tracks, more circular than the other types, were left by creatures that walked on four legs and were the largest dinosaurs at the site. Their tracks range from 6 to 11 inches (15 to 28 cm) long. Seiler said the tail-drag marks are associated with these circular footprints, so they likely were made by sauropods.
* Anchisauripus tracks measure 7 to 10 inches (18 to 25 cm) long and were made by dinosaurs that ranged from 6 to 13 feet (2 to 4 m) in length.

See also here.

Dinosaur migration: here.

Birds of Palau


This is a video about Palau.

From BirdLife:

Palau publishes IBA directory

20-10-2008

The Palau Conservation Society (PCS, BirdLife in Palau) has recently published the book Important Bird Areas (IBAs) in Palau. The Republic of Palau is a small island nation in the tropical western Pacific, and the westernmost island group in the sub-region known as Micronesia.

The book, which describes the eight IBAs that have been identified by PCS and partners, will be distributed to decision-makers, traditional leaders, communities, land-owners and visitors. The identification of IBAs is expected to contribute to the on-going identification and management of protected areas in Palau.

“The eight IBAs identified in the new book cover about 47% of Palau’s total land area. Two of these sites, the remote southwest islands of Fana and Helen, are significant for their congregations of seabirds, especially Great Crested Terns Sterna bergii and Black Noddies Anous minutus”, said Dr Elizabeth Matthews, PCS Chief Program Officer.

“Three of the other sites are on Babeldaob, Palau’s largest island. These sites are important habitats for endemic forest birds”, noted Dr Matthews. Ngeriungs, an island in the Kayangel atoll, has Palau’s largest known population of Endangered Micronesian Megapodes Megapodius laperouse. The Rock Islands, Palau’s primary diving and recreation destination, was identified as an IBA for the presence of Micronesian Megapodes, as well as restricted-range, endemic forest birds.

Ngeruktabel, one of the largest of the Rock Islands and Peleliu (another IBA) were the only two places in Palau where all of the country’s nine endemic species were found. This included Near-Threatened Palau Ground-dove Gallicolumba canifrons, Palau Fruit-dove Ptilinopus pelewensis, Palau Scops-owl Otus podarginus, Palau Swiftlet Collocalia pelewensis, Palau Fantail Rhipidura lepida, Palau Bush-warbler Cettia annae, Near-Threatened Giant White-eye Megazosterops palauensis, Dusky White-eye Zosterops finschii and Morningbird Colluricincla tenebrosa.