Search results
Results From The WOW.Com Content Network
The dental key, (also known as Clef de Garengeot, Fothergill-Key, English-Key, Dimppel Extractor or Tooth Key) was first mentioned in Alexander Monro's Medical Essays and Observations in 1742, but had probably been in use since around 1730. It remained popular into the 20th century when it was replaced by the more modern forceps.
Fowler's toad in leaf litter. Anaxyrus fowleri, Fowler's toad, [3] is a species of toad in the family Bufonidae. The species is native to North America, where it occurs in much of the eastern United States and parts of adjacent Canada. [1] [2] It was previously considered a subspecies of Woodhouse's toad (Anaxyrus woodhousii, formerly Bufo ...
Depending on the species, male or female toads may possess a Bidder's organ, a trait unique to all bufonids except genera Melanophryniscus and Truebella. [8] Under the right conditions, the organ becomes an active ovary. [9] The loss of teeth has arisen in frogs independently over 20 times. Notably, all members of Bufonidae are toothless.
Sometimes several toads form a heap, each male trying to grasp the female at the base. It is a stressful period and mortality is high among breeding toads. [15] A successful male stays in amplexus for several days and, as the female lays a long, double string of small black eggs, he fertilises them with his sperm. As the pair wander piggyback ...
To maximize mating for a male, some yellow-bellied male toads will engage in water-wave-producing behavior. This is where a male will kick its hind legs into a small body of water, generating a wave-like pattern. This pattern not only attracts females but is a mechanism of making a male’s territory known.
Fertilization takes place externally, with sperm being released in the vicinity of the eggs. As with other species of toad, the male oak toad has a Bidder's organ, which can become a functional ovary in the event of testicular malfunction. [11] [12] Size comparison. Adult male (left), female (right). Smallest toad species in North America.
Eastern Narrow-mouth Toad, (Gastrophryne carolinensis) Liberty Co. Texas, USA. Gastrophyryne carolinensis toads are weak jumpers, thus either run or move by short and rapid hops. [16] In general, the males move more than the females. [3] These toads are mainly nocturnal, and generally remain under ground or hidden in debris during the day. [3]
The breeding season of the arroyo toad revolves around the months of late winter and early spring after seasonal rains. The male toad will choose a spot near a river or water bank where he will make mating calls to attract a female toad. They mate in an amplexus position, and the female toad returns to the location to lay her eggs by the water ...