Dinosaurs Without Bones (77 page)

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Authors: Anthony J. Martin

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FIGUURE 32. Main forms of bird tracks, from left to right: anisodactyl, palmate, totipalmate, and zygodactyl; a typical bird walking-trackway pattern, made by a boat-tailed grackle (
Quiscalus major
) on Sapelo Island, Georgia. Scale bar in bottom photo = 10 cm (4 in).

FIGURE 33. Modern bird burrow, probably from a northern rough-winged swallow (
Stelgidopteryx
serripennis
), which it dug into a soft Pleistocene sandstone on Cumberland Island, Georgia. Scale in both centimeters and inches.

FIGURE 34. Big sauropod tracks in Early Cretaceous sandstones, exposed at low tide near Broome, Western Australia. Spousal unit (Ruth Schowalter) for scale.

FIGURE 35. Nesting ground of Australasian gannets (
Morus serrator
) with regularly and
densely spaced nest mounds on an elevated marine platform: Muriwai Beach (North Island), New Zealand.

FIGURE 36. Theropod track forms—avian and non-avian—that were
likely seen by Charles Darwin in South America (Argentina) and Edward Hitchcock in North America (Massachusetts) at about the same time during the early 19th century. Track (top) of greater rhea (
Rhea americana
) in Patagonia, Argentina; scale in centimeters. Theropod dinosaur track (right) from the Connecticut River Valley similar to those described by Edward Hitchcock. Scale = 5 cm (2 in) in both photographs;
photo of dinosaur track by Patrick Getty.

All rights reserved, including without limitation the right to reproduce this ebook or any portion thereof in any form or by any means, whether electronic or mechanical, now known or hereinafter invented, without the express written permission of the publisher.

Copyright © 2014 by Anthony J. Martin

978-1-4804-4802-5

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