Westat paychecks are issued on Fridays for the prior week (Monday-Sunday). To be paid on time, data collectors must submit correctly completed timesheets by Sunday midnight EST for work done during the previous week. Taking advantage of direct deposit will allow for the quickest payment.
Most species of poison dart frogs are small, sometimes less than 1.5 cm (0.59 in) in adult length, although a few grow up to 6 cm (2.4 in) in length. They weigh 1 oz. on average. Most poison dart frogs are brightly colored, displaying aposematic patterns to warn potential predators.oison dart frogs are endemic to humid, tropical environments of Central and South America. These frogs are generally found in tropical rainforests, including in Bolivia, Costa Rica, Brazil, Colombia, Ecuador, Venezuela, Suriname, French Guiana, Peru, Panama, Guyana, Nicaragua, and Hawaii (introduced).
View full size image. The colorful markings of poison dart frogs vary depending on where the frogs live. Now, a new study using thousands of fake-frog decoys finds that these markings evolved hyper-locally, explaining why individuals in a single species of frog can sport so many different colors and patterns.n the animal kingdom, bright colors are often a sign for predators to steer clear. Toxic moths and butterflies don yellow-green wings; cyanide-oozing millipedes glow with a sickly bioluminescence. The poison dart frog Ranitomeya imitator sports bright colors on its back.