Headquaters |
With the rain and floods finally
drying up it was time for the second round of adult catching. With the troops
rallied - from Prague and Bruno and Studenec - the six long days of catching
began. Our field house, which consists of a kitchen and two bedrooms (one of which is really the living room), was soon
home to ten people and things got a little cozy.
I am used to getting up to band
birds at 3:30 in the morning and sneaking around a quiet, dark house. Well, when
ten people are up that early with only 15 min to go before heading to the field
site, breakfast and bathroom use and just moving through the hallway becomes
pretty chaotic, and no one is really awake enough to manage it gracefully. One morning
in particular, I was the first one up and went to the kitchen to start the hot
water kettle, because we all need our caffeine, and I nearly stepped on two
guys in boxers sleeping on the kitchen floor. I had no idea who they were or when they arrived and I
think we were all a little startled. The brain has trouble understanding things
like this at 3:30 in the morning. I don’t think I actually said anything to
them, I just turned around and wandered to the bathroom to brush my teeth
instead and processed the event after ingesting my caffeine. Turns out they
were potential grad students who had come to check out the field and had
arrived after I had gone to bed. Finding no other floor space, they took up
residence in the kitchen. I am not sure
if they knew we were getting up at 3:30, but they were certainly woken up at that time.
We banded for six days at four field
sites and captured 245 adults, a little over 100 of which were new birds that
we had not caught the first time around. There was also one female who we caught five times in a row because she seemed to get a thrill out of throwing herself
into the net. During this time we also
had to keep up with our other fieldwork for the cross-fostering study, so we spent
our days actually living and breathing barn swallows, and not sleeping very
much. To make things a little more challenging, Tomas brought a cold with him
from Prague, and like our own mild version of Typhoid Mary (Typhoid Tomas has a
nice ring…) he proceeded to give it to everyone. Within two days 6 of us had
it, which given our cramped living conditions it is no mystery how it spread. So
with runny noses we banded and counted and measured and collected samples and
filled out data sheets…
Amanda and Adella to count parasites Yes that's much needed beer! |
There were several highlights worth
mentioning in that six-day blur of swallows. First Tomas decided that someone
needed to learn to count parasites, to continue my legacy after we leave. He
volunteered Adella and Romana, who made an effort to try and look excited for
my benefit. I guess even the glasses fashion statement is not enough to make
someone want to count tiny parasites for hours. Feeling a little bad about
making anyone else do this task that I seem to have dedicated my life to, I
attempted to teach them the subtle art of parasite counts. It was no easy task.
Joey put on the glasses and tried to count feather mites for about two minutes,
and then decide that she had absolutely no interest in learning to count
parasites. Adella and Romana, not having the luxury of a choice, were forced to
soldier on.
Joey and I also got to take part in
an exciting sexual trait manipulation experiment. It was a first for me,
though
Joey took part in a similar experiment that happened in Colorado in 2009. The
basic idea is that barn swallows, though they may appear to be monogamous,
faithful little birds, actually do a lot of sleeping around - the scientific term being extra-pair copulations (which sounds so much less risque). The number of extra-pair copulations a female participates in depends on how good her mate is. So, the evil scientists come around
and determine how much paternity a female allocates to her mate in their first
clutch of eggs, and then we manipulate
his attractive trait (this is the evil part), and look at how the female adjusts paternity allocation in the second
round of chicks. Here in Europe the game is all about how long your tail
streamers are, or at least that is what we think is going on. To figure this
out, we catch all the males at a site, cut their tail streamers off, and then
shuffle them so we reattach them to different birds using tiny pins and super
glue. The birds then end up shorter, longer, or the same (control) and we see
whether their females step out on them more or less compared to the first brood. You have
to admit that is pretty clever. Joey and I were a little
heartbroken about our record male. He had the longest tail streamers we had
ever measured, 141mm (the longest in CO is 121). He was one studly dude, but
unfortunately ended up with the short end of the experimental stick and had his
manly streamers swapped with one of the shortest males in the population losing a full 3 cm! Both of those
male were in for a bit of a change when we released them.
Measuring sperm motility and concntration |
The other exciting event was that
Joey and I learned, and then attempted for ourselves, how to collectavian sperm samples...the delicate art of the cloacal massage. Happy to report that we were both successful at getting the birds to ejaculate and donate some of their swimmers to science. Our mothers would be
proud, and Joey can tell her sister that she actually does molest birds for a
living. It takes just the right positioning and pressure and it's impossible not to make crude jokes in the process. There is also the
reward or watching those little guys zoom around under the microscope.
You will be happy to know that it
is now over 90 degrees and humid here.
Over and Out,
Amanda