During the post-breeding season, a small heath (200 x 110 m) with even smaller pool (15 x 20 m), surrounded by woodland, in western Drenthe attracted single Hobbies in 10 out of 16 years (1992-2007). The duration of their stay at the heath varied between 1 and at least 60 minutes (on average 21.7 minutes), usually in the evening. From a high vantage post, they captured dragonflies using short sallies. Capture frequency averaged 1.16 attempts per 10 minutes (412 observation minutes, 48 attempts of which 47 successful). Hobbies were highly selective in their prey choice, favouring the larger dragonfly species (Aeshna, Orthretum). The local supply of dragonflies in August 2007 (n=725) consisted of a few large species (Aeshna, Orthretum: 0.1%), a fair number of medium-sized species (mostly Sympetrum spp.: 21.7%) and an abundance of small species ( Lestes spp. and Enallagma cyathigerum: 77.2%). Out of 47 captures of dragonflies, 66% were large, 34% medium-sized and 0% small. The number of captures, and especially the total mass of captured dragonflies, levelled off the longer Hobbies resided at the heath (Fig. 1). Giving-up density was not calculated, but the fact that Hobbies on average only stayed half an hour or less at the site indicates that giving-up density is reached as soon as most (or all) large dragonflies have been removed. We found no evidence that giving-up was related to the birds reaching a digestive bottleneck. Observations on a nearby heath from 31 August through 2 September 1997, when a 2nd-year female Hobby was tracked continuously for more than 27 hours, showed that the bird captured 66-89 large dragonflies per day (sufficient to meet an estimated energy expenditure of 250-300 kJ/day-1), with an average of 1.08-1.23 captures/10 minutes (i.e. similar to the value found at the much smaller heath mentioned above). This bird left the site when capture rate had dropped to an average of 0.23 dragonflies/10 minutes. Whether this departure was due to depletion of the site, or a drop in temperature (depressing flight activity of dragonflies), was not clear.