File:The Canadian field-naturalist (1924) (20493190876).jpg

Title: The Canadian field-naturalist
Identifier: canadianfieldnat1924otta (find matches)
Year: 1924 (1920s)
Authors: Ottawa Field-Naturalists' Club
Subjects:
Publisher: Ottawa, Ottawa Field-Naturalists' Club
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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136 The Canadian Field-Naturalist (Vol. XXXVIII NOTES AND OBSERVATIONS
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To Make the Detachable Funnel Trap for Bird Banding.âTake a piece of J" wire netting 4'x3'. Cut down the dotted lines AAAA Fig. 1. Fold along the double lines, Jig. 1. Overlap the corners to give double strength. Take 2 pieces of ;" board 14"x8". Tack one on top of the other and cut out of both a half circle as Fig. 2. Separate them and tack one to the trap at C, Fig. 1. (Do not tack the wire to the inner edge of arch as the funnel has to pass under here when completed). Cut the wire away through the arch, this gives the main entrance. Take a piece of wire netting about 12"x20' and cut roughly as Fig. 3. Bend up the edges along the dotted lines and press sides together to form Fig. 4. (This must be done to suit your special requirements. I find a useful size for Jays and smaller birds is an opening at the small end of the funnel of 3"x3". This size requires no altering nor projecting wires.) Place your arch over the large end of the funneland tack on along the inner edge of the arch. This now fits in against its fellow arch at C, Fig. 1, and can be removed when desired. . Cut away an opening 4" high by 3" wide at D., Fig. 1, 2" or 3" away from the corner. Keep a collecting box covering this opening at all times. NOTES in connection WITH this trap I have experimented with a great many traps during the last eight months, trying them out under all pos- sible conditions, and I find that under the conditions prevailing here, Mill Bay, Vancouver Island, I am unable to get sufficient repeats with resident species to satisfy me, with either the Sieve Trap (drop-trap) or the Govern- ment Sparrow Trap, because the for- mer 'slams' and makes certain species highly nervous, whilst the latter with its fixed funnel never becomes popu- lar as a regular feeding platform. The Detachable Funnel Trap, how- ever, allows birds to feed in and out of it through the entrance whenever the trapper so desires, which is very neces- sary in regaining the confidence of over- trapped or very shy species. Birds caught in this trap are never so ner- vous or 'jumpy' in going under the arch, as a drop-trap repeat is when re- entering the drop-trap. I also find that the drop-trap will often spoil cer- tain species from entering any other traps unless hard pressed for food, but after feeding unmolested for a few days in the Detachable Funnel Trap they seem to regain confidence and repeat fairly steadily if a little judgment be used on the part of the trapper m handhng the funnel. I also found the Government Sparrow Trap too high, causing unnecessary bad bruising, also too narrow, and with the funnel at the end instead of the side, it makes two funnels necessary when one should do, as well as requirmg projectmg wires. Neither of the latter are necessary as far as I have experienced, with the Detachable Funnel Trap, nor need the size of the opening be altered, for I have caught Quail, Jays, and Sparrows equally well without to my knowledge having lost a bird, and I have often, on purpose, given them all chances to find their way out. For larger birds than Sparrows I advise pegging down the corners with forked sticks or tacking the bottom edges of two opposite sides to light poles. This trap may be used as a 'slam' trap by placing a â wire

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