Dactyly
Videos
In biology, dactyly is the arrangement of digits on the hands, feet, or sometimes wings of a tetrapod animal. The term is derived from the Ancient Greek word δάκτυλος, meaning "finger."
Human foot with partial simple syndactyly.
Tridactyly (Mikhail Tal)
Didactyly
Monodactyly
Trogon
Videos
The trogons and quetzals are birds in the order Trogoniformes which contains only one family, the Trogonidae. The family Trogonidae contains 49 species in seven genera. The fossil record of the trogon
Dactyly
…osprey are zygodactyl. Heterodactyly is like zygodactyly, except that digits 3 and 4 point forward and digits 1 and 2 point back. This is found only in trogons, though the enantiornithean Dalingheornis might also have had this arrangement. Pamprodactyly is an arrangement in which all four toes point forward…
Harpactes erythrocephalus Khao Yai
Male masked trogon Trogon personatus temperatus
Fossil of Masillatrogon from Messel
The tendons of the foot, showing the arrangement with a reversed second toe. The plantar tendon on the front (flexor perforans digitorum) splits into two sections, and enters the front toes while the hind plantar (flexor longus hallucis) splits and enters the hind toes.