much

PC: Gregory Smith

PC: Eric Carlson

PC: Francesco Veronesi

PC: James Diedrick

PC: Eric Carlson

PC: Eric Carlson

PC: Eric Carlson

PC: Andy Morffew

PC: Eric Carlson

PC: USFWS

PC: Judy Gallagher

PC: Jerry Kirkhart

PC: Ron Knight

PC: Andy Morffew

PC: Bettina Arrigoni

PC: USFS

PC: David Alvarez Lopez

PC: Ingrid Taylar

PC: Great Sand Dunes NP

PC: Stephen Lester

PC: Eric Carlson

PC: Cuatrok77

PC: Eric Carlson

PC: Ozzy Delaney





Week: 32

Mass: 1702 g

Bird: Barnacle Goose

PC: Bob Peterson

PC: Silver Leapers

PC: Cuatrok77

PC: Francesco Veronesi

PC: USFWS

PC: Bettina Arrigoni

PC: BLM

PC: M. J. Taylor

Since I got the news that I'm going to be an aunt, I've found myself becoming interested in fetal development. This is not a subject I had previously givenany thought to. As I count down the weeks until I meet my future nephew, I've been keeping track of his size using the customary fruits and vegetables that websites suggest. This is problematic because vegetables are variable in size and also boring. My mind went instead to birds. I started looking up a bird that matched the mass* of the fetus each week, much to the possibly feigned delight of my pregnant sister. I now present a full list for the enjoyment of pregnant folks and the birders who love them.* Note that most birds are less dense that a fetus, and therefore greater in size at the same mass.Week: 9Mass: 2 gBird: Bumblebee HummingbirdWeek: 10Mass: 4 gBird: Anna's HummingbirdWeek: 11Mass: 7 gBird: Wilson's WarblerWeek: 12Mass: 14 gBird: Vermillion FlycatcherWeek: 13Mass: 23 gBird: Tree SwallowWeek: 14Mass: 43 gBird: Snowy PloverWeek: 15Mass: 70 gBird: Northern Pygmy-OwlWeek: 16Mass: 100 gBird: Green JayWeek: 17Mass: 140 gBird: Burrowing OwlWeek: 18Mass: 190 gBird: MerlinWeek: 19Mass: 240 gBird: Purple GallinuleWeek: 20Mass: 300 gBird: Long-tailed JaegerWeek: 21Mass: 360 gBird: White-tailed PtarmiganWeek: 22Mass: 430 gBird: Swallow-tailed KiteWeek: 23Mass: 501 gBird: Bristle-thighed CurlewWeek: 24Mass: 600 gBird: Spotted OwlWeek: 25Mass: 660 gBird: Fulvous Whistling-DuckWeek: 26Mass: 760 gBird: Tufted PuffinWeek: 27Mass: 875 gBird: Swainson's HawkWeek: 28Mass: 1005 gBird: Western GullWeek: 29Mass: 1153 gBird: Common RavenWeek: 30Mass: 1319 gBird: AnhingaWeek: 31Mass: 1502 gBird: Roseate SpoonbillWeek: 33Mass: 1918 gBird: Turkey VultureWeek: 34Mass: 2146 gBird: Common EiderWeek: 35Mass: 2383 gBird: Wood StorkWeek: 36Mass: 2622 gBird: Arctic LoonWeek: 37Mass: 2859 gBird: Greater Sage-Grouse (male)Week: 38Mass: 3083 gBird: Laysan AlbatrossWeek: 39Mass: 3288 gBird: Lesser Sandhill CraneWeek: 40Mass: 3462 gBird: Brown PelicanSources:www.babycenter.comThe Sibley Guide to Birds, 2nd Ed., by David Sibley, 2014