When they reach South America, B.A.'s medallions change several times.
In one scene a tarantula is seen traversing a spider web. Tarantulas actively pursue their prey while webs are designed solely for trapping. Tarantulas use their silk for mating, shelter, and molting. Besides, they are far too heavy to hang from webs, especially the one shown on the show.
Being in South America it is unlikely that the helicopter would have an N-Number (N58384). The Hughes 300 (model 269C s/n 990829) would simply not have the range to travel the distance. The maximum is 204 miles at 109 MPH.