Flying weight

Flying weight is the condition at which an individual hawk is ready to fly, not a single weight that applies to every bird. In Helen Macdonald’s account of training Mabel the goshawk, reaching it depends on combining measurement with close observation: a scale can record a number, but the hawk’s posture, attention, and behavior give that number meaning. The concept names both a practical training threshold and a form of knowledge acquired through watching a particular bird.

Definition and Assessment

The term refers to a hawk’s condition, judged in relation to its body and readiness to fly. Macdonald describes Mabel at two pounds and one and a half ounces as having reached that condition: her agitation, nervousness, and tendency to bate from her perch when bored had subsided, replaced by calmness and sustained attention. In this account, the significance of the measurement lies in its correspondence with a change in the bird, not in its status as a target to apply mechanically.

The assessment is individual. T. H. White described condition as something judged by the austringer who knew the hawk and was finely attuned to it. Macdonald recognizes the force of that idea in her own response to Mabel: her condition seemed evident through the way her behavior had changed. Flying weight therefore joins measurable mass to a practiced reading of the bird. The number matters, but it is not, by itself, a complete account of whether the hawk is ready.

Scales and Older Practice

Macdonald notes that antiquarian falconry books do not use the words flying weight because the falconers they describe did not use scales. Instead, they assessed a hawk by feeling its muscles and breastbone and observing its behavior. This required experience and close attention; for a novice, the subtleties of bringing a bird into flying condition could be difficult to grasp. The contrast is not simply between old and new equipment. It is between direct bodily judgment and a numerical instrument, with neither making the need to understand the individual hawk disappear.

Macdonald sees weighing as a cruder measure than the intuitive understanding that comes from knowing a hawk well, but she would not train a hawk without scales. Her practice with merlins illustrates why. She weighed them three times a day and carefully tracked how different foods affected their weight; even an eighth of an ounce could alter how one of these small falcons flew. With Mabel, a much larger goshawk, the calculation was less fine-grained, but deciding how much food would bring her into flying condition remained difficult. Notes of weights and question marks accumulated on scraps of paper as Macdonald tried to calculate the right amount.

Mabel’s Changing Condition

The account gives more than one measurement for Mabel, demonstrating that flying weight is not a permanent attribute or a universal figure. At one point Macdonald identifies two pounds and one and a half ounces with a marked change in the hawk’s composure and attention. Later, on a hill with Stuart, Mabel weighs one pound and fifteen ounces. Stuart reads her upright stance, the feathers over her toes and crown, and her firm grasp of the glove as signs that she is a different hawk that day. When Macdonald calls, Mabel flies to her across fifty yards of uneven ground and stays on the glove; she then makes three more confident flights along the creance.

That response supplies a practical test of the assessment. Stuart concludes that Mabel has reached her flying weight and that a few more days of this work should prepare her to fly free. Macdonald acknowledges that she had miscalculated the condition for weeks. The earlier number and the later one belong to separate moments in Mabel’s training, not to a fixed specification for goshawks. The changing readings, paired with changes in behavior and performance, make the individual bird—not an abstract rule—the measure of progress.

Judgment, Error, and Meaning

The hill scene also distinguishes an emotional interpretation from an assessment grounded in the hawk’s condition. Macdonald had been exhausted and had told Stuart something about how difficult things were, though not the full extent of her distress. When Mabel flew to her, Macdonald initially attributed the response to having confessed and feeling better. She then recognizes that this explanation reflects the self-involvement of grief: the more immediate cause was that she had finally judged Mabel’s flying weight correctly. The scene thus separates the trainer’s need to make meaning from the practical evidence of the bird’s readiness.

Flying weight is consequently both a measurement problem and a relationship of attention. Scales can help track changes, yet the relevant judgment still depends on interpreting a hawk’s body and behavior over time. Macdonald’s account moves between figures, observations, and flight: the number is checked against the bird, and the bird’s response tests the trainer’s estimate. Mabel’s eventual flights show the consequence of getting that judgment right, while the weeks of miscalculation show why a scale alone cannot supply it. The concept is most fully realized not as a number to reach in isolation, but as a condition recognized through knowledge of the particular hawk.