Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Frequency of Eristalis tenax flies walking towards a yellow or blue spot displayed on either arms of a T-shaped artificial flower dependent of training (n = 60). Different letters denote significant differences due to a two-tailed Chi-square test (p<0.01). The inset shows the artificial flower used in the tests.
