Thursday, February 22, 2018

Roseate Spoonbill Breeding Plumage



Roseate Spoonbill Breeding Plumage



Roseate Spoonbills are now nesting in small colonies. They are quite a sight with pink and red flight feathers, greenish head and yellow shoulders, and of course that spoonbill. They were nearly extinct by the early part of last century and are a species of concern. A video of a flock of feeding Roseate Spoonbills: https://youtu.be/tY5kBWPp6pg
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Physical Description
The roseate spoonbill is the only spoonbill endemic (native) to the Western Hemisphere. This species can reach a length of 30-40 inches (76-102 centimeters) with a wingspan of 50-53 inches (127-135 centimeters). It has pink wings and underparts (with some red on the tops of the wings) with a white neck and back, and pinkish legs and feet. While the species looks almost entirely pink in flight, they actually have no feathers at all on their heads. The pink coloration comes from the organisms on which they feed, which are full of caroteniods (organic pigment). As the name implies, the roseate spoonbill also has a large, spoon-shaped bill, which it sweeps back and forth in shallow water to capture prey.
Life History
The specialized bill has sensitive nerve endings which help the birds search for food in shallow water. The diet of the roseate spoonbill primarily consists of crayfish, shrimp, crabs, and small fish.
There is no sexual dimorphism (difference in form between individuals of different genders in the same species) in roseate spoonbills. They nest in mixed colonies (near other wading bird species) in mangroves or trees and though most breed on the coast, some nest inland. Nesting habitats include coastal mangroves and dredged-made islands. The female builds the nest while the male retrieves the nesting materials. The female lays up to three whitish-colored eggs and both adults incubate the eggs for up to 24 days. The young remain in the nest for approximately 35-42 days and are fed by both adults.
Habitat and Distribution
The roseate spoonbill is a resident breeder in South America, generally east of the Andes, and coastal areas of Central America, the Caribbean, and the Gulf of Mexico. Mangrove islands and occasionally dredge-spoil islands are the preferred nesting habitat for the species. In Florida, the species is found in Florida Bay, Tampa Bay, and Brevard County.
Threats:
One historical threat to the roseate spoonbill was hunting for their feathers, though this practice is now illegal which has allowed the population to rebound. Another threat to the spoonbill is the availability of adequate food sources and habitat degradation. In the Florida Bay, the increased fresh water flow from the Everglades may affect prey availability for the spoonbill. Other threats include habitat loss and disturbance, pesticides, and illegal shootings.
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Roseate Spoonbill Breeding Plumage

Roseate Spoonbill Breeding Plumage

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