Botulinum toxin is the most powerful toxin ever known. Its huge potential has been used in the last decades to treat some pathologies that attend with acetylcholine’s metabolic disturbances. Botulinum toxin effects are not indefinite in time, so it must be applied several times (usually twice a year), thanks to the changes produced by this toxin the rehabilitation of infantile spasticity are easier (the greatest results are seen on abductor muscles, calves, etc.) and on ocular muscles to treat squint. It is also used in some muscle alterations, pathologies of the autonomic nervous system, painful syndromes. The life quality of children with cerebral palsy is improving thanks to this toxin.
Presentamos el primer registro del colibrí cola pinta (Tilmatura dupontii) en la Sierra Juárez, Oaxaca, México. En junio de 2010, observamos y fotografiamos una hembra de esta especie por cuatro días forrajeando sobre diez especies de plantas. Esta especie es endémica de Mesoamérica y aunque se encuentra en cinco países centroamericanos, su distribución es fragmentada y con restricciones de altitud y tipo de hábitat. Registros para la Sierra Juárez, Oaxaca, eran ausentes. Estudios en México han reportado esta especie como poco común y su biología reproductiva no se ha descrito. Por lo anterior, consideramos que es necesario llevar a cabo estudios que nos permitan entender su distribución, biología y ecología.
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