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If the stimulus/background contrast is reversed, the toad prefers the trailing edge of the white stripe and often snaps behind it. Obviously, "off"-effects (rapid change in luminance from bright to dark) by the moving contrast borders play a guiding role. Generally, white square objects moving against a black background are more attractive as ...
The western toad (Anaxyrus boreas) is a large toad species, between 5.6 and 13 cm (2.2 and 5.1 in) long, native to western North America. [ 1 ] [ 3 ] [ 4 ] A. boreas is frequently encountered during the wet season on roads, or near water at other times.
This diminutive toad is less than 5 cm (2 in) in length. [3] The starry night toad's coloration consists of irregular white patches dappled across a black background. The white markings can present as separate spots or as an interconnected mosaic. Their skin texture is defined by even coverage of warts. [4]
The colour is a fairly uniform shade of brown, olive-brown or greyish-brown, sometimes partly blotched or banded with a darker shade. The common toad tends to be sexually dimorphic with the females being browner and the males greyer. [16] The underside is a dirty white speckled with grey and black patches. [15] [17]
Ansonia albomaculata, also known as the white-lipped slender toad and whitebelly stream toad, is a species of toad in the family Bufonidae. It is endemic to the island of Borneo and can be found in Sabah and Sarawak (Malaysia), Brunei , and northern Kalimantan (Indonesia).
Toad is a common name for certain frogs, especially of the family Bufonidae, that are characterized by dry, leathery skin, short legs, and large bumps covering the parotoid glands. [ 1 ] [ 2 ] In popular culture ( folk taxonomy ), toads are associated with drier, rougher skin and more terrestrial habitats. [ 3 ]
The Gulf Coast toad is a medium-sized toad species, ranging from 2.5 to 10.2 cm (1 to 4 in) in length. [5] Their back varies in color from nearly black, to shades of brown and grey with a distinctive white or yellowish colored stripe down the center, and sometimes lighter colored patches on the sides. Their underside is yellow or cream colored.
The eastern American toad (A. a. americanus) is a medium-sized toad usually ranging in size from 5–9 cm (2.0–3.5 in); [13] the record length for an eastern American toad is 11.1 cm (4.4 in). [14] The color and pattern is somewhat variable, especially for the females.