The shell of this molusc cephalopod is shaped in its interior as a nearly perfect equiangular spiral. Although it is not a golden spiral, it is often used as an example of a nature structure close to this morphology. The nautilus expands its shell as it grows, adding internal chambers in this logarithmic spiral coated in mother of pearl. The body is situated in the last chamber, and about 90 slim tentacles and a large eye peer out. The tentacles, which bear little anatomical resemblance to the suckered tentacles of squid, function mainly in smelling and manipulating food. When imperiled by predators, the nautilus withdraws into its armor and seals the door with a tough, leathery hood. In the outer part the shell exhibits countershading, being light on the bottom and dark on top. This is to help avoid being seen by predators from above and below. Why this shell shape? Because in order to swim, the nautilus draws water into and out of the living chamber with its hyponome, which uses jet propulsion. While water is inside the chamber, the siphuncle extracts salt from it and diffuses it into the blood. The animal adjusts its buoyancy either removing liquid from its chambers or by allowing water from the blood in the siphuncle to slowly refill the chambers. This is done in response to sudden changes in buoyancy that can occur with predatory attacks of fish, which can break off parts of the shell. This limits nautiluses in that they cannot operate under the extreme hydrostatic pressures found at depths greater than approximately 800 metres (2,600 ft).
This species has the typical short-tailed, dumpy-bodied large-headed and long-billed kingfisher shape. The adult male has green-blue upperparts with pale azure-blue back and rump, a rufous patch by the bill base, and a rufous ear-patch. It has a green-blue neck stripe, white neck blaze and throat, rufous underparts, and a black bill with some red at the base. The legs and feet are bright red. It is about 16 cm long with a wingspan of 25 cm, and weighs 34–46 grams. The female is identical in appearance to the male except that her lower mandible is orange-red with a black tip.
Another species living in the ponds of Pairi Daiza by choice. these grebes are usuals in ponds and lakes in Belgium. The juvenile shows a particular white and black stripped pattern in the head. When they follow their parents they continuously cry loudly for food. However this one was by itself, quitely preening.
For the developers at New York start-up Networked Organisms, smartphones are the butterfly nets of the 21st Century. Their tool, Project Noah, lets people upload photos of plants and wildlife around them, creating a map of the natural world and contributing to scientific research in the process.
Bespectacled scientists of yore would carry around hefty field guides, made up of hundreds of pages of text and photos. But these days, smartphone owners have a lighter option: an app called Project Noah, which aims to help people identify plants and animals as well as collect data from "citizen scientists" about where certain species are located.
Project Noah enables us to be part of a more focused online community where we can learn more about wildlife around us and contribute to scientific research. It pulls participants into deeper, more meaningful engagement by enabling people to go on “missions” to collectively map changes based on sightings.
A modern invention that may also hold the key to saving species in the future. Project Noah is a global study that encourages nature lovers to document the wildlife they encounter, using a purpose built phone app and web community. In addition to the virtual "collection" of species, Project Noah encourages citizen science by linking up with existing surveys including the International Spider Survey and the Global Coral Reef Monitoring Network.