Charles Darwin's Tinamou
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Researchers Document Aviary Eggshell with Iridescence for the First Time 10 December 2014, by Bob Yirka
Researchers document aviary eggshell with iridescence for the first time 10 December 2014, by Bob Yirka they found to be made of calcium phosphate, calcium carbonate, and some other yet to be identified organic compounds) which gave the egg its glossy sheen. When they removed the cuticle from a portion of an egg sample—they found that it was blue underneath, but that the iridescence was gone. Thus, they concluded that the iridescent blue was due to a combination of the pigment and Photographs (a–c) of T. major, E. elegans and N. cuticle. maculosa nests. Average length breadth of eggs (a–c): 58 48 mm, 53 39 mm and 40 29 mm. Photo credits: The researchers can't say for sure why the bird Karsten Thomsen, Sam Houston and Shirley eggs have such features as they would appear to Sekarajasingham. Journal of the Royal Society Interface, draw attention to them, rather than help keep them Published 10 December 2014 . DOI: 10.1098/rsif.2014.1210 hidden. It seems possible that the iridescence actually causes the eggs to be more difficult to see in their particular environment to a particular type of prey. More likely, the researchers suggest is that (Phys.org)—A team of researchers with members eggs that stand out can be more easily spotted or from New Zealand, Czech Republic and the U.S. differentiated from other eggs from birds of the has documented for the first time an example of an same species, which could serve as a means of aviary egg that has iridescence. In their paper encouraging males to assist with incubation. -
Incubation Constancy in the Red-Winged Blackbird
INCUBATION CONSTANCY IN THE RED-WINGED BLACKBIRD LARRY C. HOLCOMB Avian incubation behavior is affected by a multitude of exogenous and en- dogenous factors. Kendeigh (1952, 196313) and Skutch (1962) reviewed in- cubation in many different orders of birds and discussed factors affecting the amount of time spent in incubation. Among workers recently reporting on incubation behavior in wild passerines are Prescott (1964)) Mumford (1964)) Erpino (1968)) Maxwell and Putnam (1972)) and Morton et al. (1972). In the Red-winged Blackbird (Ag e1 aius phoeniceus) , Nero (1956a, 195613) has published observations on female behavior during the repro- ductive cycle, but nothing was reported on the incubation constancy (per- cent of daylight hours spent on the nest). I have reported (Holcomb, 1968, 1970) that female Redwings incubated normal-sized artificial eggs a mean of 19.4 days before abandoning them. This is 8.4 days beyond the normal incubation period. The present study was designed to determine the incubation constancy in the egg-laying period, to discover if it increased each day as the incubation behavior developed, and to find if there was less incubation each day as females neared the day when eggs were abandoned in prolonged incubation. METHODS I studied the incubation behavior of Red-winged Blackbirds near Omaha, Nebraska, in 1968 and 1969. Birds were breeding in a variety of habitats, including weed, alfalfa, and clover fields, hedgerows, ditch banks, and marshes. I visited the nesting areas nearly every day, beginning in March and ending in August. Male Redwings generally arrived in early March and females soon afterward. -
Natural History and Breeding Behavior of the Tinamou, Nothoprocta Ornata
THE AUK A QUARTERLY JOURNAL OF ORNITHOLOGY VoL. 72 APRIL, 1955 No. 2 NATURAL HISTORY AND BREEDING BEHAVIOR OF THE TINAMOU, NOTHOPROCTA ORNATA ON the high mountainous plain of southern Peril west of Lake Titicaca live three speciesof the little known family Tinamidae. The three speciesrepresent three different genera and grade in size from the small, quail-sizedNothura darwini found in the farin land and grassy hills about Lake Titicaca between 12,500 and 13,300 feet to the large, pheasant-sized Tinamotis pentlandi in the bleak country between 14,000 and 16,000 feet. Nothoproctaornata, the third species in this area and the one to be discussedin the present report, is in- termediate in size and generally occurs at intermediate elevations. In Peril we have encountered Nothoproctabetween 13,000 and 14,300 feet. It often lives in the same grassy areas as Nothura; indeed, the two speciesmay be flushed simultaneouslyfrom the same spot. This is not true of Nothoproctaand the larger tinamou, Tinamotis, for although at places they occur within a few hundred yards of each other, Nothoproctais usually found in the bunch grassknown locally as ichu (mostly Stipa ichu) or in a mixture of ichu and tola shrubs, whereas Tinamotis usually occurs in the range of a different bunch grass, Festuca orthophylla. The three speciesof tinamous are dis- tinguished by the inhabitants, some of whom refer to Nothura as "codorniz" and to Nothoproctaas "perdiz." Tinamotis is always called "quivia," "quello," "keu," or some similar derivative of its distinctive call. The hilly, almost treeless countryside in which Nothoproctalives in southern Peril is used primarily for grazing sheep, alpacas,llamas, and cattle. -
Care of Fertile Eggs Prior to Incubation 1
CARE OF FERTILE EGGS PRIOR TO INCUBATION 1. Keep eggs at 50º - 60º F (room temperature). (DON’T PUT IN A REFRIGERATOR, IT IS TOO COLD!) 2. Store the eggs with the BIG end up in egg cartons. 3. You can store for 10 days after they have been laid before hatch rate decreases (50% hatch rate is a good rate). Incubation / hatching time begins once the eggs are placed in the incubator and brought up to 99 ½ºF. Count day 1 after first 24 hours. Incubation/hatching time for chickens are 21 days and 28 to 33 days for ducks. INCUBATOR SET UP 1. Place the incubator(s) away from any windows as the sunlight will magnify thru the plexi-glass cover making it too hot. 2. Set up the incubator four (4) hours prior to adding eggs; it will give the incubator an opportunity to Diagram #2 Round Corner regulate the water temperature in the reservoir. Diagram #1 Put water into both of the troughs on the square Square corner incubator incubator cornered incubators (see diagram #1). In the round corner model which has a larger and smaller trough, place water in the outside trough labeled “circulating” (see diagram #2). (Be sure that the incubator turns on at 99º and off at 100ºF.) 3. Place the plastic thermometer, simply lay it across the top of the eggs, (see diagram #5). It will basically ride on top of the eggs. 4. Cover the adjusting stem on top with paper cup taped to help eliminate the likelihood of the setting being accidentally changed. -
Birds of Brazil
BIRDS OF BRAZIL - MP3 SOUND COLLECTION version 2.0 List of recordings 0001 1 Greater Rhea 1 Song 0:17 Rhea americana (20/7/2005, Chapada dos Guimaraes, Mato Grosso, Brazil, 15.20S,55.50W) © Peter Boesman 0006 1 Gray Tinamou 1 Song 0:43 Tinamus tao (15/8/2007 18:30h, Nirgua area, San Felipe, Venezuela, 10.15N,68.30W) © Peter Boesman 0006 2 Gray Tinamou 2 Song 0:24 Tinamus tao (2/1/2008 17:15h, Tarapoto tunnel road, San Martín, Peru, 06.25S,76.15W) © Peter Boesman 0006 3 Gray Tinamou 3 Whistle 0:09 Tinamus tao (15/8/2007 18:30h, Nirgua area, San Felipe, Venezuela, 10.15N,68.30W) © Peter Boesman 0007 1 Solitary Tinamou 1 Song () 0:05 Tinamus solitarius (11/8/2004 08:00h, Serra da Graciosa, Paraná, Brazil, 25.20S,48.55W) © Peter Boesman. 0009 1 Great Tinamou 1 Song 1:31 Tinamus major (3/1/2008 18:45h, Morro de Calzada, San Martín, Peru, 06.00S,77.05W) © Peter Boesman 0009 2 Great Tinamou 2 Song 0:31 Tinamus major (28/7/2009 18:00h, Pantiacolla Lodge, Madre de Dios, Peru, 12.39S,71.14W) © Peter Boesman 0009 3 Great Tinamou 3 Song 0:27 Tinamus major (26/7/2009 17:00h, Pantiacolla Lodge, Madre de Dios, Peru, 12.39S,71.14W) © Peter Boesman 0009 4 Great Tinamou 4 Song 0:46 Tinamus major (22nd July 2010 17h00, ACTS Explornapo, Loreto, Peru, 120 m. 3°10' S, 72°55' W). (Background: Thrush-like Antpitta, Elegant Woodcreeper). © Peter Boesman. 0009 5 Great Tinamou 5 Call 0:11 Tinamus major (17/7/2006 17:30h, Iracema falls, Presidente Figueiredo, Amazonas, Brazil, 02.00S,60.00W) © Peter Boesman. -
Class Three: Breeding
Class Three: Breeding WHERE DO SEABIRDS LAY THEIR EGGS? Nest or no nest? • Some species use no nesting material. E.g., the white tern lays a single egg on an open branch. • Some species use a very little bit of nesting material. E.g., the tufted puffin may use a few pieces of grass and a couple of feathers. • Some species build more substantial nests. E.g. kittiwakes cement their nests onto small cliff shelves by trampling mud and guano to form a base. And, some cormorants build large nests in trees from sticks and twigs. [email protected] www.seabirdyouth.org 1 White tern • Also called fairy tern. • Tropical seabird species. • Lays egg on branch or fork in tree. No nest. • Newly hatched chicks have well developed feet to hang onto the nesting-site. White Tern. © Pillot, via Creative Commons. On the coast or inland? • Most seabird species breed on the coast and offshore islands. • Some species breed fairly far inland, but still commute to the ocean to feed. E.g., kittlitz’s murrelets nest on scree slopes on coastal mountains, and parents may travel more than 70km to their feeding grounds. • Other species breed far inland and never travel to the ocean. E.g., double crested cormorants breed on the coast, but also on lakes in many states such as Minnesota. [email protected] www.seabirdyouth.org 2 NESTING HABITAT (1) Ground Some species breed on the ground. These species tend to breed in areas with little or no predation, such as offshore islands (e.g., terns and gulls) or in the Antarctic (e.g., penguins, albatross). -
Egg Laying in Pet Birds Egg Laying in Pet Birds Can Be a Serious Health Threat
Egg Laying in Pet Birds Egg laying in pet birds can be a serious health threat. This article explains why (and what to do if) your bird starts laying eggs. Providing proper, non-incandescent lighting, a healthy diet, and adequate sleep, as well as removing nesting toys or materials are key to discouraging egg laying. Overview In wild birds and breeding birds, egg laying is a natural, seasonal process. However, female pet birds can also lay eggs, even without the presence of a male. Such eggs are infertile and will not hatch, even if incubated. A bird in the peak of health on an ideal diet may be able to sustain some egg production without serious harm. However, with captive pet birds, it can also become an obsession, because the eggs do not hatch and allow the full cycle to complete, thus turning off the hormonal trigger to lay eggs. Constant egg laying will deplete your bird of vital nutrients, and predispose her to malnutrition , osteoporosis, and life-threatening health problems, such as egg binding and yolk peritonitis. While egg laying can occur in any breed, it is most common in cockatiels, lovebirds, budgies, canaries, and finches. Egg laying can start anytime from 5 months to over 10 years of age. If you find an egg, you want to immediately correct any environmental factors that predispose your bird to lay eggs. If that does not work, your bird may require medical treatment to control egg laying, so you’ll want to get her to a qualified Avian vet. There are several safe, effective hormonal treatments available, which your Avian vet can tailor to your bird's needs. -
Nest Building and Egg Laying by Redwinged Blackbirds in Response to Artificial Manipulations
NEST BUILDING AND EGG LAYING BY REDWINGED BLACKBIRDS IN RESPONSE TO ARTIFICIAL MANIPULATIONS LARRY C. HOLCOMB THE responsesof breedingbirds to many external stimuli have been well reviewedby Lehrman (1959), Eisner (1960), and van Tienhoven (1961). The studiesperformed by Emlen (1941) on the Tricolored Blackbird (Agelaiustricolor) are especiallyrelevant to this paper because of somesimilarities of this icterid to the RedwingedBlackbird (Agelaius phoeniceus).Orians (1961) reportsthe similaritiesand differencesin the ecologyand social systemsof the Redwingedand Tricolored Blackbirds. The objectivesof the presentstudy were to assesssome of the external stimuli that affect physiologicaland related behavioral patterns in the Red-wing. The two nmin objectiveswere to 1) determineresponses of Red- wings to artificial nest manipulations,compared with thosereported by Emlen (1941) for the TricoloredBlackbird, and 2) discoverif Red-wings are determinateor indeterminatelayers. Emlen found that the TricoloredBlackbird usually lays its first egg on the day followingnest completion.Payne (1965) reportsthat Tricolored Blackbirdsusually lay their first eggin the morningfollowing completion of the nestbut that Red-wingfemales have a rangeof 1-4 days. In addition Payne notes that all Tricolored Blackbirds had ovulated on the day of lining the nest, whereassix of eight Red-wing femalestaken from lined nestshad not ovulated. I have made similar observationson Red-wings. Payne statesthat "clutchsize of RedwingedBlackbirds is apparentlydeter- mined by the developmentof the ovary a few days before the final egg is laid." Holcomb and Twiest (1968) present data on the time between nest completionand egglaying for 42 uplandand marshbreeding Red-wings in May and June. Theseshow a meandelay in laying of 2.0 days after nest completion,with a range of between0 and 5 days. -
Hatching Small Numbers of Eggs
PNW 478 Reprinted October 1995 Hatching small numbers of eggs J.C. Hermes ncubation is the process by which the embryo within the egg develops into a fully formed chick capable of breaking free from the shell. Incubat- Iing eggs requires several important environmental considerations if any chicks are to hatch. Of primary concern are temperature and relative humidity. Attention to secondary considerations can result in increased numbers of eggs hatching. Natural vs. artificial relative humidity within the proper limits to hatch chicks. incubation Artificial incubation is an The first decision to be made excellent alternative to the is whether to incubate eggs broody hen. naturally or artificially. Natural incubation uses a broody hen to Temperature incubate eggs by sitting on them Correct incubation tempera- in a nest. Broody hens, when ture depends on the type of available, work best for small incubator. In forced draft incuba- clutches of eggs. tors, those in which a fan is Broodiness, the behavior of a present, temperature should be incubators, humidity is attained setting hen, has been bred out of ° maintained between 99.5 F and by filling a pan or some other some chickens. Others don’t care ° 100 F for most bird eggs. In still reservoir in the incubator with for chicks effectively. Some air incubators, where no fan breeds commonly used to hatch water. is present, a temperature of For most eggs, a relative eggs include New Hampshires, between 101°F and 103°F Plymouth Rocks, Rhode Island humidity of between 55 and measured at the top of the egg 60 percent is adequate during the Reds, and Cochins. -
Southeast Brazil: Atlantic Rainforest and Savanna, Oct-Nov 2016
Tropical Birding Trip Report Southeast Brazil: Atlantic Rainforest and Savanna, Oct-Nov 2016 SOUTHEAST BRAZIL: Atlantic Rainforest and Savanna October 20th – November 8th, 2016 TOUR LEADER: Nick Athanas Report and photos by Nick Athanas Helmeted Woodpecker - one of our most memorable sightings of the tour It had been a couple of years since I last guided this tour, and I had forgotten how much fun it could be. We covered a lot of ground and visited a great series of parks, lodges, and reserves, racking up a respectable group list of 459 bird species seen as well as some nice mammals. There was a lot of rain in the area, but we had to consider ourselves fortunate that the rainiest days seemed to coincide with our long travel days, so it really didn’t cost us too much in the way of birds. My personal trip favorite sighting was our amazing and prolonged encounter with a rare Helmeted Woodpecker! Others of note included extreme close-ups of Spot-winged Wood-Quail, a surprise Sungrebe, multiple White-necked Hawks, Long-trained Nightjar, 31 species of antbirds, scope views of Variegated Antpitta, a point-blank Spotted Bamboowren, tons of colorful hummers and tanagers, TWO Maned Wolves at the same time, and Giant Anteater. This report is a bit light on text and a bit heavy of photos, mainly due to my insane schedule lately where I have hardly had any time at home, but all photos are from the tour. www.tropicalbirding.com +1-409-515-9110 [email protected] Tropical Birding Trip Report Southeast Brazil: Atlantic Rainforest and Savanna, Oct-Nov 2016 The trip started in the city of Curitiba. -
Am Er Ican B Ir D Co N S Er Van
2006 ANNUAL REPORT AMERICAN BIRD CONSERVANCY AMERICAN BIRD CONSERVANCY From the Chairman and the President e are pleased to report on a great year for Islands in Washington, are continuing our fight American Bird Conservancy in 2006— to save Laysan Albatrosses from lead-based paint and that means a great year for birds. poisoning on Midway Island, and are leading the WWith support from its growing list of friends and transformation of bird monitoring by bringing supporters, each year ABC is able to save more rare together stakeholders to improve and unify accepted species, protect more land, and effectively address practices. Also in 2007, we expect membership more threats to birds. And each year, ABC gains of our Bird Conservation Alliance to surpass 200 additional partners and new, innovative solutions to organizations. the problems facing birds. We now believe ABC will not just stanch the loss of our precious avifauna, but ABC’s supporters are the key to our success, and we can often make strides in its recovery. Please read appreciate each and every one, large and small. Many this 2006 Annual Report to enjoy our conservation of you have become our friends as well. We care what highlights and to reflect on the beneficial effects of you think, and encourage you to contact us with your your support. ideas, thoughts, and concerns. Already in 2007, ABC has protected 25 sites for We wish we could report on all of the almost 200 some of the rarest species on Earth in Mexico, projects ABC has underway to protect birds now, but Colombia, Brazil, Peru, and Ecuador. -
Expanding the Eggshell Colour Gamut: Uroerythrin and Bilirubin from Tinamou (Tinamidae) Eggshells Randy Hamchand1, Daniel Hanley2, Richard O
www.nature.com/scientificreports OPEN Expanding the eggshell colour gamut: uroerythrin and bilirubin from tinamou (Tinamidae) eggshells Randy Hamchand1, Daniel Hanley2, Richard O. Prum3 & Christian Brückner1* To date, only two pigments have been identifed in avian eggshells: rusty-brown protoporphyrin IX and blue-green biliverdin IXα. Most avian eggshell colours can be produced by a mixture of these two tetrapyrrolic pigments. However, tinamou (Tinamidae) eggshells display colours not easily rationalised by combination of these two pigments alone, suggesting the presence of other pigments. Here, through extraction, derivatization, spectroscopy, chromatography, and mass spectrometry, we identify two novel eggshell pigments: yellow–brown tetrapyrrolic bilirubin from the guacamole- green eggshells of Eudromia elegans, and red–orange tripyrrolic uroerythrin from the purplish-brown eggshells of Nothura maculosa. Both pigments are known porphyrin catabolites and are found in the eggshells in conjunction with biliverdin IXα. A colour mixing model using the new pigments and biliverdin reproduces the respective eggshell colours. These discoveries expand our understanding of how eggshell colour diversity is achieved. We suggest that the ability of these pigments to photo- degrade may have an adaptive value for the tinamous. Birds’ eggs are found in an expansive variety of shapes, sizes, and colourings 1. Te diverse array of appearances found across Aves is achieved—in large part—through a combination of structural features, solid or patterned colorations, the use of two diferent dyes, and diferential pigment deposition. Eggshell pigments are embedded within the white calcium carbonate matrix of the egg and within a thin outer proteinaceous layer called the cuticle2–4. Tese pigments are believed to play a key role in crypsis5,6, although other, possibly dynamic 7,8, roles in inter- and intra-species signalling5,9–12 are also possible.