MALLEABLE

by | Mar 18, 2020 | Birds, Wildlife

BY KIERAN LINDSEY, PhD

 

Like Water Off a Duck’s Back — That tried and true adaptability adage is an apt observation for just about any species of waterfowl, thanks to their liquid-resistant outer contour feathers, but in the case of Mallards (Anas platyrhynchos) it’s also metaphorically germane… because this is one plucky duck.
I won’t go so far as to say Mallards are unsinkable but they are definitely buoyant.
I mean that literally, of course, but figuratively, too.

Famously Famous — Instantly recognizable and as visually splashy as Billie Eilish, male Mallards share the pop star’s penchant for verdant coiffure, rocking an iridescent emerald head set off from the body’s neutral grays, browns, and black by a bright white choker and an incandescent gold-plated bill. Female and adolescent Mallards are sartorially muted and mottled but the blingy amethyst epaulet worn on the wings of both sexes prevents any member of this clan from being tagged as a shrinking violet.

Just Add Water — Mallards need H2O to feel at home but beyond that one requirement they’re an undemanding tenant. Permanent or ephemeral, any aqueous feature will do — rivers and streams, ponds and potholes and swimming pools, marshes and croplands, even ditches and puddles. This duck can and does go with the flow, equally happy to live off the grid or as a city slicker, in any country, any hemisphere.

Anywhere You Hang Your Hat Mitochondrial DNA suggests the species originated in or near Siberia; nonetheless, the mallard is a now a genuine citizen of the world. Wild populations have fanned out and established persistent breeding populations throughout Eurasia, northern Africa, and North America, aided by the fact that Mallards get on swimmingly with human beings.
People have helped Mallards in their quest for worldwide waterfowl dominance, transporting wild birds to South America, South Africa, Australia, and New Zealand. And, as the founder stock for almost every breed of domestic duck (muscovies are the exception), Mallards have been invaluable to human agricultural aspirations. As a result of all this bridge building Mallards are the antithesis of a rare bird.

Ain’t Too Proud to BegAt mealtime, Mallards are equally willing to accept a handout or fend for themselves. They’re fexibly omnivorous, so finding something palatable is as easy as duck soup…oops! Sorry, sorry! Make that easy as pie… no, no, forget that… ducks don’t eat pie (and pie isn’t all that easy to make either).
Let’s just say this duck is a dabbler who’ll eat plants and some animals. During breeding season, Mallards prefer a bouillabaisse of snails, freshwater shrimp, insect larvae, and other aquatic invertebrates combined with a mirapoux of roots and tubers, shifting to calorie-rich comfort foods like grains and seeds as temperatures drop, especially those who migrate between summer and winter homes.

Love the One You’re With — Mallards are serial monogamists… if by monogamy you mean a faithful-unless-other-opportunities-arise 6 to 7 month liaison that begins in autumn and ends in spring. Once the female begins preparing a nursery for the baker’s dozen of shorties who may show up after these pairings, the male heads off to hang out with his bros. She makes way for ducklings; he’ll be at the local watering hole with other menfolk, discoursing at length about sports, watching for a chance to hookup with childless females in need of a baby daddy, and waiting on delivery of their new bespoke breeding plumage following an early summer molt.
Emblematic of the mallard’s broad-minded nature, acceptable matches are not limited to intraspecies suitors. Mallards will happily hybridize with American black ducks (Anas rubripes), Hawaiian koloas (Anas wyvilliana), mottled ducks (Anas fulvigula), pintails (Anas acuta), and various teals (e.g., A. carolinensis, A.cyanoptera ); they’re open to dating outside their genus, including canvasbacks (Aythya valisineria), gadwalls (Mareca strepera), and wood ducks (Aix sponsa; a male wood duck is pictured below with a female Mallard); and they won’t discriminate against a domesticated breed dumped at the park pond by someone who wanted a pet duckling but not a pet duck.

Let’s Get Our Ducks in a Row Mallards are always willing to size up a situation and adjust accordingly. For example, in places where duck hunting is a common occurrence, Mallards are extremely wary of people and understandably so. In urban settings, however, where people are more likely to be packing stale bread than shotguns, Mallards become quite tame. So unconcerned with human neighbors in close proximity, actually, that hens willingly nest on boat docks, balconies, and rooftop gardens, even though their traditional nest is a shallow scoop in moist soil near water.
In short, the secret of Mallard success seems to be a winning combination of luck and happy-go-lucky, with some clear-eyed pragmatism thrown in for good measure.
Now, isn’t that just ducky?


© 2020 Next-Door Nature. No reprints without written permission from the author (I’d love for you to share my work–just ask first). Thanks to these photographers for making their work available through a Creative Commons license (from top to bottom): Stuart Williams, Sangudo, Jean, Chris, Sally Wilson, Ingrid Taylar, Bonnie Shulman, and jans canon.

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