Anatomical evidence and conditioning experiments have recently suggested that magnetoreceptors are located in the upper beak of homing pigeons, where they are innervated by the ophthalmic branch of the trigeminal nerve. These findings have raised the issue of whether the trigeminally mediated magnetoreception is involved in the navigational mechanisms of homing pigeons. Recent data have shown t...

Newcastle disease virus (NDV) was isolated from a field outbreak in pigeons. The virus was characterized by haemagglutination test (HA) and confirmed by haemagglutination inhibition test (HAI). The pathotyping was done by mean death time (MDT), intracerebral pathogenicity index (ICPI) and intravenous pathogenicity index (IVPI). The ELD50 of the velogenic strain was 10/0.1 ml. Thirty-nine pigeon...

Pigeons and humans searched for a goal that was hidden in varied locations within a search space. The goal location was fixed relative to an array of identical landmarks. Pigeons searched on the laboratory floor, and humans searched on a table top or an outdoor field. In Experiment 1, the goal was centered in a square array of 4 landmarks. When the spacing between landmarks was increased, human...

The effect of heat stress on oxidative stress was studied in pigeons. Pigeons were either kept at thermo neutral room at 22 C, 24 hours/day or heat stress room at 34 C for 8 hours/day followed by 22 C for o o o the rest of the day during the 40 days experiment. Increased heterophils: lymphocyte ratio was evident indicating stress in pigeons. Parallel increase in leptin, metabolites and oxidativ...

The aim of this study was to confirm the feasibility using hybrid immunoglobulin-binding reagents in ELISAs for IgG/IgY detection and specific antibodies against an infectious microorganism (Salmonella spp.) various animal species a universal diagnostic ELISA. Hybrid bacterial proteins (IBP), including recombinant protein LA, LG, AG, have been produced improve their binding affinity much larger...

In three experiments, we explored how pigeons use edges, corresponding to orientation and depth discontinuities, in visual recognition tasks. In experiment 1, we compared the pigeon's ability to recognize line drawings of four different geons when trained with shaded images. The birds were trained with either a single view or five different views of each object. Because the five training views ...

In Indonesia, pigeon is one who is familiar with humans, beside can be consumed, usually maintained for hobby or pleasure. One of the parasitic worms that infect the pigeon’s kidneys was Paratanaisia bragai (P. bragai). That worm can cause pathological changes in the renal pigeons. Evaluation of renal function can be done through checking of serum creatinine and urea. This study was conducted t...

In domestic pigeons (Columba livia), the electrical activity of the major depressor muscle of the wing, the pectoralis (pars thoracicus), beings in late upstroke well before the wing begins its downstroke excursion. The two architecturally distinct heads of the pectoralis, the sternobrachialis and the thoracobrachialis, are differentially recruited during take-off, level flight and landing. In ...

Pigeons were conditioned to peck a response key under a procedure that alternated periods of food reinforcement with periods of extinction. The pigeons attacked a nearby pigeon at the onset of extinction. Some also attacked a stuffed model of a pigeon. The duration of attack was an inverse function of the time since the last food reinforcement and a direct function of the number of reinforcemen...

Pigeons and humans searched on a touch-screen monitor for an unmarked goal located relative to an array of landmarks presented in varied screen locations. After training with the goal centered in various square arrays of 4 landmarks, humans, but not pigeons, transferred accurately to arrays with novel elements. Humans searched in the middle of expanded arrays, whereas pigeons preserved the dist...