House Wrens are complicated, mysterious cheaters

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I got my start in ornithology studying the love lives of House Wrens. House Wrens pair up to raise their babies in a manner compellingly analogous to the human “nuclear family;” but, like most birds, both partners also often “cheat” on each other (i.e., copulate with other birds). This means that the male wren may have chicks in other nests besides his own, and he may end up caring for chicks that are not biologically related to him. (Note: edited. The original version of this sentence had a mistake.)

This sets up a number of interesting questions, such as: why cheat on your partner? Are the chicks sired by outside birds somehow better? Do males know when they are caring for chicks who aren’t their own? The answer to the latter question seems pretty clear (no, the males do not know), but the former two are more challenging.

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This webcomic gets it

As a scientist, I can’t exactly claim to to be underserved by the webcomic community. xkcd does nerdy jokes, including ones about biologists and birds; Hark A Vagrant occasionally covers historical scientists like Rosalind Franklin and Charles Darwin (twice); and Saturday Morning Breakfast Cereal often delves into evolutionary biology, with takes ridiculousentertaining, and sometimes a bit too real.

Still, before today, I had never seen an ornithological behavioral ecology comic. (Talk about niche audiences.)

Thank you, Saturday Morning Breakfast Cereal, for filling this hole in my life.

(Original comic webpage here.)