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The Javan kingfisher is a medium-sized bird (25–27 cm at maturity) with a distinctive large red bill; dark brown irises, head, throat, and collar; a purple body; vivid turquoise primary coverts, secondaries, and tail; white wing patches on the bases of the primaries (visible in flight); and dark red feet.
Beelzebufo most likely was a predator whose expansive mouth allowed it to eat relatively large prey, perhaps even juvenile dinosaurs. [ 9 ] [ 10 ] Bite force measurements from a growth series of Cranwell's horned frog ( Ceratophrys cranwelli ), suggest that the bite force of a large Beelzebufo —skull width 15.4 cm (6.1 in)—may have been ...
The egg is not retained in the body for most of the period of development of the embryo within the egg, which is the main distinction between oviparity and ovoviviparity. [1] Oviparity occurs in all birds, most reptiles, some fishes, and most arthropods. Among mammals, monotremes (four species of echidna, and the platypus) are uniquely oviparous.
The common cuckoo brood parasite removing the reed warbler eggs from their own nest. Egg tossing or egg destruction is a behavior observed in some species of birds where one individual removes an egg from the communal nest. [1] This is related to infanticide, where parents kill their own or other's offspring. [2]
Pairs form in the autumn but each bird retains a separate territory, generally at least 1 km (1 ⁄ 2 mi) long, but up to 3.5 km (2 + 1 ⁄ 4 mi) and territories are not merged until the spring. [7] The courtship is initiated by the male chasing the female while calling continually, and later by ritual feeding, with copulation usually following ...
The egg cell is generally asymmetric, having an animal pole (future ectoderm). It is covered with protective envelopes, with different layers. The first envelope – the one in contact with the membrane of the egg – is made of glycoproteins and is known as the vitelline membrane (zona pellucida in mammals).
The documentary is a follow-up of an episode in Madagascar, filmed in 1960, for Attenborough's earliest nature documentary series, Zoo Quest. [ 1 ] [ 2 ] In that episode, a native boy gave Attenborough a collection of large pieces of eggshell, which Attenborough temporarily pieced together with sticky tape to form a complete eggshell of the ...
Goose egg addling is a wildlife management method of population control for Canada geese and other bird species. The process of addling involves temporarily removing fertilized eggs from the nest , testing for embryo development , killing the embryo, and placing the egg back in the nest.