It does the usual hydropneumatic thing of moving languidly over undulations, flattening crests and filling in dips.
They are noted for the males' flattened circular crest extending over the bill.
As commanders weigh the need for additional troops to flatten the crest of violence, troops of the First Armored Division have been told they may be held in Iraq for up to 90 days past their planned departure this month.
Pet slowly, and withdraw slowly if the bird hisses, nips at you, or flattens its crest.
A small crowd of common gulls, oyster catchers, sandpipers and orange-billed royal terns, their black crests flattened by gulf breezes, made way for me as I trailed a pair of snowy ibises with long, curving beaks.
This can be difficult to avoid due to the painful bite, so try to avoid serious bites in the first place by leaving the cockatiel alone when it is hissing, when it has fully extended its head crest, or when its crest is flattened against its head.
P. abstrusus is also similar in size to P. yinanensis and can be distinguished from the latter in a flattened forehead, posteriorly projected sagittal crest, p4 posterior accessory cuspule on lingual side of posterior crest, an m1 pre-entoconid, and less elongated M1 and M2.
Fruits ovoid to didymous, distinctly broader than long, 7.5-8.0 × 9-10 mm, green when young, glabrous, calyx limb persistent; Seeds 2, obliquely ovoid, ventrally flattened, 2-5.5 × 3 mm, apical crest very shallow to nearly inconspicuous, pyrene cartilaginous.
The troughs tend to flatten and the crests sharpen toward a point, a shape known as a conoidal wave.
The skulls by and large have thin walls and are rounded, rather than low and flattened; they do not have the heavy crests and projecting browridges characteristic of later H. erectus.
It has been suggested that the crests of the museum specimens were flattened during preparation.
