whoodpeckers

The woodpeckers, and wrynecks piculets Are to family, Picidae, of near-passerine birds. Members of this family are found worldwide, except for Australia and New Zealand, Madagascar, and the extreme polar regions. Most species live in forests or woodland habitats, although species A Few Are Known to live in areas Such as Treeless rocky hillside and deserts.

Many of the foraging, breeding and signaling Involve Behaviors of woodpeckers drumming and hammering using the bill. To Prevent Brain Damage and Repeat from the rapid decelerations, woodpeckers Have evolved a number of Adaptations to Protect the brain. These include small brain size, the orientation of the brain within the skull.and the short duration of contact. The millisecond Before Thickened contact with wood to membrane nictitans closes, protecting the eye from flying debris. The nostrils Are Also protected; They Are Often slit-like and special Have Them feathers to cover.
Woodpeckers, and wrynecks piculets Possess all zygodactyl feet. Zygodactyl feet consist of four toes, the first and the Fourth Facing backward and the second and third Facing Forward. This arrangement is good for foot grasping the limbs and trunks of trees. Members of this family can walk up a tree trunk vertically s, which is beneficial for Activities Such as foraging for food or nest excavation. In Addition to the strong claws and feet short woodpeckers have strong legs; this is typical of birds That Regularly forage on trunks. The tails of all woodpeckers except the wrynecks Are piculets and stiffened, and when to the bird perches on Vertical Surfaces, the tail and feet work together to support it.

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Low educational level in 80% of Mexican children
The level of knowledge and learning of children in primary and secondary education in Spanish and mathematics is in about de 8 million students in just over 10 million assessed the Secretariat of Public Education , according to resultsNational Assessment of Academic Achievement in Schools.The test indicates that 77.7%  were primary performance "poor to basic" in mathematics, while in Spanish the proportion who go on this "group" rating is 75.4% .
In the case of young people tested in high school, 94.4% of them were rated "poor and basic" in math, while 1.3 million had the same performance in Spanish.According to the report for ENLACE only 8 000 young people of students had a test "excellent" in math, and only 1% rated in Spanish.After that President Felipe Calderón announced the results of ENLACE in Los Pinos, the holder of the Planning Unit, Jorge Santibanez, quoted a press conference to detail the results and said it was the first time in the country that parents, students and teachers will visit the school situation by subject and grade classroom, and make comparisons by school zone, county, state and nationwide by school type."That may be," noting that today, the SEP will announce the list of the ranking of the best schools in the country in different ranges: the first school where a higher proportion of students achieved levels of excellence in mathematics and Spanish, also disseminate information to the schools that stand out for each subject and grade."I do not know if the best is public or private school, but you can tell," promised the official.In the case of students who earned the best national performance, the official said that once parents say it is OK to attend a ceremony with President Felipe Calderon.Jorge Santibanez also commented that "the political climate we live in Michoacán and which exceeds the national education system" was decided not to validate the test in that entity LINK, after it was found that in 2 000 classrooms of the institution "theconsideration was given virtually "by teachers to students.That was considered sufficient "evidence that management was not attached to ethics" by teachers accused.The federal government official said that so far the SEP and education authorities in Michoacán have not applied any sanctions for teachers who participated in this process of "copy", but has created a table that together will decide what type of penalties apply.As evidence of the proceedings "unethical" by the Michoacan teachers and students of that institution, Santibanez said that in those schools where it did the review, the SEP found that the percentage of students with excellent grade point average is tripled to six.The lowest performance occurred in Chiapas, Guerrero, Hidalgo, Nayarit, Oaxaca, Puebla, San Luis Potosí, Tabasco and Zacatecas.