Desert  Swallowtail      Papilio  polyxenes coloro Immatures -  2017 Home - Butterflies - Details Adults - 2017     Male - 2006     Immatures, host, specimen - 2005

Ova 30 March 2017 First instar 31 March 2017 Second Instar 2 April 2017 Third Instar 10 mm long on 4 April 2017 Third Instar 4 April 2017 Fourth Instar - 7 April 2017 Fourth Instar - 7 April 2017 Fifth Instar  Lateral View - 9 April 2017 Fifth Instar Dorsal View - 9 April 2017 The yellow/orange osmeterium gland, which emits a disagreeable odor, is extended  when larvae of swallowtails feel threatened Fifth Instar Head - 9 April 2017 Pupa - 15 April 2017 Pupa - 15 April 2017 A different colored pupa on 17 April 2017 Photo Details - ©Nicky Davis Members of the Utah Butterfly Club went on an outing to Welcome Springs, Washington County, Utah on 18 March 2017 where female Coloro butterflies were located.  The following week, Tony Jones arranged the female coloros on host plant to acquire ova.  Todd Stout and Sheryl Stout removed the ova from the host plant and placed in containers for the members interested in rearing the butterflies.  Larvae began emerging March 29, 2017. 1.  Ova 2.  First Instar - These all emerged 29 March  2017,  2-3 mm long 3.  Second Instar  - Molted to second instar on 2 April 2017, 5 mm long 4., 5. Third Instar - Molted to third instar on 4 April 2017, 10 mm long 6.  Fourth Instar on 7 April 2017 7.  8., 9. 10.  Fifth Instar on 9 April 2017 and osmeterium 11., 12.  Two photos of pupa on 15 April 2017 13.  A different colored pupa 16 April 2017 Host Plant Thamnosma montana- Turpentine Broom We used Fennel (Foeniculum vulgare) as host plant which agrees with the caterpillar