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Why do different butterfly species have similar wing patterns?

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May Dixon<br />

At 5 pm in Gamboa, not far<br />

from the Panama Canal, the<br />

playground is crowded with<br />

kids. Next <strong>do</strong>or, May Dixon is<br />

getting ready to mist-net bats.<br />

A recent graduate of Carlton<br />

College, May came to Gamboa<br />

as field technician for staff<br />

scientist, Rachel Page. “I<br />

already had rabies shots,” said<br />

the self-described wild woman,<br />

who’s caught hundreds of bats<br />

in the month that she’s been<br />

here. “In New England where<br />

I’m from there are only two<br />

<strong>species</strong> of bats but here in<br />

Panama there are around 120<br />

<strong>species</strong>.”<br />

At the forest’s edge, May sets<br />

up what looks like a badminton<br />

net made with very fine, black<br />

nylon thread. Only an hour<br />

after dark, a bat that she has<br />

never seen before summersaults<br />

into the net. “It’s a boy. It’s<br />

probably an insect eater that<br />

uses passive listening because it<br />

has long ears. Its broad <strong>wing</strong>s<br />

mean that it’s probably good at<br />

maneuvering.”<br />

Micronycteris hirsuta, the<br />

Hairy Big-Eared Bat, with<br />

its mohawk-like tuft of hair,<br />

is not the coolest bat she’s<br />

caught so far. That was a Great<br />

Wooly False Vampire on Barro<br />

Colora<strong>do</strong> Island! “It was a little<br />

bit terrifying.”<br />

May Dixon<br />

En Gamboa, a las 5 de la<br />

tarde, no muy lejos del Canal<br />

de Panamá los niños juegan<br />

en el parque. Muy cerca May<br />

Dixon se prepara para atrapar<br />

murciélagos con redes de<br />

niebla.<br />

May, recién graduada del<br />

Carlton College en Minnesota,<br />

EEUU, llegó a Gamboa como<br />

asistente de campo para Rachel<br />

Page, científica de planta del<br />

Smithsonian. “Ya me inyecté<br />

contra la rabia,” comenta May,<br />

que ha atrapa<strong>do</strong> a cientos de<br />

murciélagos durante el mes<br />

que ha esta<strong>do</strong> aquí. “En New<br />

England de <strong>do</strong>nde vengo,<br />

sólo hay <strong>do</strong>s e<strong>species</strong>, pero en<br />

Panamá hay alrede<strong>do</strong>r de 120<br />

e<strong>species</strong>.”<br />

A la orilla del bosque, May<br />

instala lo que parece una red<br />

de bádminton hecha de fino<br />

hilo de nylon negro. Una hora<br />

después del anochecer, cae<br />

en la red un murciélago que<br />

ella nunca había visto. “Es<br />

un macho. Probablemente se<br />

alimenta de insectos por medio<br />

de la escucha pasiva pues tiene<br />

orejas largas. Sus amplias alas<br />

significan que probablemente<br />

es bueno maniobran<strong>do</strong>.”<br />

El Micronycteris hirsuta,<br />

murciélago pelu<strong>do</strong> de grandes<br />

orejas y con un mechón de<br />

pelos estilo “mohawk” no es el<br />

murciélago más interesante que<br />

May haya atrapa<strong>do</strong>. Ese fue un<br />

gran vampiro falso pelu<strong>do</strong> en la<br />

isla Barro Colora<strong>do</strong> “Me aterró<br />

un poco.”<br />

Questions/comments<br />

Preguntas/comentarios<br />

STRINews@si.edu<br />

Photo by Pamela Belding<br />

May Dixon carefully untangles a bat captured<br />

in a mist net.<br />

May Dixon desenreda cuida<strong>do</strong>samente a un<br />

murciélago enreda<strong>do</strong> en una red de niebla.

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