Tag Archives: blood

Vampire birds

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The vampire strikes again! Photo by Ian White*

The vampire strikes again!
Photo by Ian White*

In honor of Halloween, let’s talk about vampire birds.

I am using “vampire” loosely here, the same way people do when they talk about “vampire” bats. These vampire birds are hematophagic (blood-eating!), but do not follow other items of vampire lore: they have reflections in mirrors, can enter your house without an invitation, do not shape-shift, are mortal, and do not sparkle in the sunlight.

Sharp-beaked Ground Finch, Geospiza difficilus

This is one of the famous Darwin’s Finches of the Galápagos Islands. This species is a vampire only on two of the islands, Wolf and Darwin; everywhere else it eats bugs and seeds like a regular finch. Even on Wolf and Darwin, it mostly eats bugs and seeds, but sometimes it craves something a little… richer…

Dum-dum-DUMMMM. (Sharp-beaked Ground Finch. Photo by budgora*)

Dum-dum-DUMMMM.
(Sharp-beaked Ground Finch. Photo by budgora*)

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Blood secrets

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Sometimes doing science feels like doing magic. Take a fantastical witch brewing eye of toad and nightshade flower in a cauldron, substitute a 1.5 ml tube for the cauldron, AW1 Buffer for the nightshade flower, and blood of junco for the eye of toad, and that’s me.

(And that “eye of ___” thing happens in science too: a few of my herpetologist colleagues have been talking lately about what you can learn from preserved lizard eyes.)

One of the things I do when I capture a junco is to collect a blood sample. I use a sterile needle, collect very little blood, and don’t let the bird go until I’m sure the bleeding has stopped. The birds usually don’t even flinch. They act much more upset when I blow on their chests to look for brood patches (I think it feels cold to them) than they do when I take blood.

Me collecting blood from GRAY. The blood moves up the tiny capillary tube on its own. Photo by M. LaBarbera.

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